ATIKA SCHOOL
  • Home
    • Atika School Advanced Search
    • News and Opinions
    • Echo
    • Academic Environment
    • How its Done
    • SITEMAP
    • About Us? >
      • About Us
      • Learn more about us
  • TUTORIALS
    • SECONDARY >
      • SCIENCES >
        • FOCUS MATHEMATICS TUTORIALS AND EXAMS FREE
        • KCSE BIOLOGY NOTES
        • FREE KCSE CHEMISTRY NOTES
        • KCSE PHYSICS NOTES, AUDIOVISUALS AND MORE
      • LANGUAGES >
        • ENGLISH >
          • English KCSE Set Books
          • ENGLISH GRAMMAR #KCSE
        • CHOZI LA HERI - MWONGOZO
        • KIGOGO - MWONGOZO
        • KCSE Kiswahili
      • TECHNICALS >
        • KCSE BUSINESS STUDIES NOTES
        • kcse Computer Studies Notes
        • KCSE AGRICULTURE NOTES, SYLLABUS, QUESTIONS, ANSWERS, SCHEMES OF WORK AND OTHERS
      • HUMANITIES >
        • KCSE History Notes Form 1 to 4
        • FREE KCSE CRE NOTES
        • KCSE GEOGRAPHY NOTES
        • IRE NOTES, AUDIOVISUAL, QUESTIONS AND ANSWERS
    • MASOMO VIDEOS
    • PRIMARY >
      • NOTES >
        • KISWAHILI
        • SOCIAL STUDIES >
          • STANDARD 4: SOCIAL STUDIES
        • SCIENCE
        • ENGLISH >
          • KCPE and Primary Level Compositions
        • MATHEMATICS >
          • KCPE Mathematics Notes
      • EXAMINATIONS >
        • DecaTurbo Online Series Examinations
        • TOP INSHA AND COMPOSITION QUESTIONS
        • CBC Kiswahili
        • FOCUS A365 SERIES K.C.P.E EXAMINATIONS FOR PRIMARY
        • Standard 8 (std) English Topical Questions
      • SYLLABUS >
        • Primary Mathematics Syllabus
  • CURRICULUM
    • NEW CURRICULUM DESIGNS >
      • PRIMARY >
        • PRE PRIMARY ONE CURRICULUM WITH SYLLABUS
        • PRE PRIMARY TWO CURRICULUM WITH SYLLABUS
      • SECONDARY >
        • KNEC KCSE SYLLABUS AND COURSE OUTLINES
      • COLLEGE >
        • Regulations for the TIVET Craft and Diploma Business Examinations
  • PRODUCTS
    • All Categories
    • FREE DOCUMENTS
    • PRIMARY CBC BASED RESOURCES
    • PRIMARY 8-4-4 BASED RESOURCES >
      • STANDARD 8 RESOURCES
    • COLLEGE & VARSITY RESOURCES
    • HIGH SCHOOL RESOURCES
    • FREE NOVELS >
      • COURSE BOOKS
      • KCSE KISWAHILI SETBOOKS
    • Backed Up Files and Archives
  • EXAMINATIONS
    • PRIMARY EXAMS >
      • Assignments and Random Exams
      • 8-4-4 >
        • STANDARD 8 PAST PAPERS 8-4-4 BASED
      • CBC
    • TOP SCHOOLS EXAMINATIONS LATEST >
      • Assignments and Random Exams
    • KCPE >
      • KCPE PAST PAPERS AND ANSWERS
    • KCSE >
      • KCSE BY SUBJECT >
        • KCSE PAST PAPERS BY SUBJECT
        • Free KCSE Past Papers Mathematics
        • Free KCSE Biology Questions and Answers
      • KCSE BY YEAR >
        • KNEC KCSE PAST PAPERS, MARKING SCHEMES, QUESTIONS & ANSWERS
    • QUESTIONS & ANSWERS >
      • SECONDARY >
        • LANGUAGES >
          • ENGLISH POETRY QUESTIONS WITH ANSWERS FOR K.C.S.E CANDIDATES
        • TECHNICALS >
          • COMPUTER STUDIES >
            • COMPUTER STUDIES Q & A
            • kcse computer studies paper 2 AND 3 Questions & Answers
          • BUSINESS STUDIES QUESTIONS & ANSWERS
          • KCSE AGRICULTURE TOPICAL QUESTIONS
          • KCSE HOME SCIENCE DIRECT QUESTIONS AND ANSWERS
        • SCIENCES >
          • KCSE Mathematics Topical Questions
          • KCSE Biology Topical Questions and Answers
          • CHEMISTRY TOPICAL QUESTIONS AND ANSWERS
          • KCSE Physics Topical Questions
          • KCSE physics Practical Sample Quiz
        • HUMANITIES >
          • ISLAMIC RELIGIOUS EDUCATION (IRE) QUESTIONS AND ANSWERS
          • C.R.E (CRE) QUESTION AND ANSWERS
          • KCSE History Topical Questions and Answers
          • GEOGRAPHY TOPICAL QUESTIONS AND ANSWERS
      • PRIMARY >
        • Standard 4-8 Mathematics Topical Questions from Mocks and KCPE
        • Std 6 Mathematics Notes
  • HIGH INSTITUTIONS
    • EXAMINATIONS >
      • College and Varsity Past Papers online >
        • College and Varsity Past Papers online
    • TUTORIALS
  • PRICING
  • BLOGS
    • Contact
    • Help & Support
    • MPESA FORM
  • Search Free Documents (PDF)

K.C.S.E Biology Q & A - MODEL 2019PP2QN04

2/7/2020

Comments

 

K.C.S.E Biology Q & A - MODEL 2019PP2QN04

In cats, the gene for fur colour is sex-linked. Letter G represents the gene for ginger fur colour while letter B represents the gene for black fur colour in a given cat species. These genes are co-dominant. Heterozygous females have ginger and black patches of fur and their phenotype is described as tortoise-shell.
Picture
​(a) With reference to the information given above, what is meant by the term co-dominance? 
(b) Explain why male cats with a tortoise-shell phenotype do not usually occur. 
(c) A tortoise-shell female was crossed with a black male. Determine the genotypes and phenotypes of the offspring.
answers
Picture
Comments

K.C.S.E Biology Q & A - MODEL 2018PP1QN18

1/7/2020

Comments

 

K.C.S.E Biology Q & A - MODEL 2018PP1QN18

​A tall, light skinned lady with pimples on her face has long hair and limps.
Picture
(a) List two features which the lady has that are due to inheritance. 
(b) Explain why most recessive genes are expressed phenotypically in male offspring of humans.
answers
​(a) Height (tallness);
Long hair;
Skin colour (light);
(b) Most of the genes are sex-linked and are carried on the X - chromosomes; boys receive X chromosomes from the mother (and Y chromosomes from the father); if the X carries a recessive gene, it is more likely to be phenotypically expressed in boys;
Comments

State how in-breeding leads to reduced hybrid vigour

1/7/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2017PP2QN05

State how in-breeding leads to reduced hybrid vigour

Picture
answer
  • Chances of recessive/defective genes being combined increase,hence weaker offspring;
Comments

State two advantages of using genetically modified varieties in bean farming.

1/7/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2017PP2QN05

State two advantages of using genetically modified varieties in bean farming.

Picture
answers
  •  Higher yields;
  •  Enhanced resistance to diseases/pests;
  •  Early/faster maturity;
  •  Enhanced resistance to harsh climatic conditions (drought/extremes in temperature);
Comments

K.C.S.E Biology Q & A - MODEL 2017PP2QN05

1/7/2020

Comments

 

K.C.S.E Biology Q & A - MODEL 2017PP2QN05

In beans, the gene for purple colour is dominant over the gene for white colour. A pure breeding bean plant with purple colour was crossed with a heterozygous bean plant.
Using the letter P to represent the gene for purple colour, work out the genotypic ratio of the offspring.
Picture
answer
Picture
Comments

K.C.S.E Biology Q & A - MODEL 2017PP1QN16

30/6/2020

Comments

 

K.C.S.E Biology Q & A - MODEL 2017PP1QN16

The following are text messages on a celiphone that represent gene mutation.
Picture
​(a) Identify the type of gene mutation represented in each case
I 
II  
(b) State Mendel’s First Law. 
(c) State two disadvantages of genetically modified plant products.
answers
​a. I — Deletion; 
II- Inversion; 
b. The characteristics /traits of an organism are determined by internal factors/ genes (which occur in pairs). Only one of the genes can be carried in a gamete/ passed onto the next generation;
 c.  Most have lost most of the original (desirable) qualities e.g taste;
 Poor/undesirable qualities are perpetuated through subsequent generations;
 Products’ qualities are irreversible- can’t get original species/qualities; 
Comments

Explain why people with sickle cell trait have an adaption survival advantage over normal individuals in malaria endemic regions.

30/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2016PP2QN02

Explain why people with sickle cell trait have an adaption survival advantage over normal individuals in malaria endemic regions.

Picture
ANSWERS
  • People with sickle cell trait are resistant to malaria; because the plasmodium cannot survive in sickle shaped red blood cells;
Comments

Differentiate between sickle cell anaemia and sickle cell trait.

30/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2016PP2QN02

Differentiate between sickle cell anaemia and sickle cell trait.

Picture
ANSWERS
  • Sickle-cell trait is heterozygous while sickle cell anaemia is a homozygous condition
Comments

How is sex determined in man?

30/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2016PP2QN02

How is sex determined in man?

Picture
ANSWERS
  • Males have two dissimilar chromosomes X and y/heterogametic;
  •  Females have two similar chromosomes X and X/homogametic;
  •  Male gamete/sperms have either X or y chromosome, while all ova have X chromosome;
  •  if a sperm with X fuses with an ovum a female is formed and if a sperm with
  •  fuses with an ovum a male is formed;
Comments

A female with sickle cell trait marries a normal man. The allele for sickle cell isHbS and the normal allele is HbA. Determine the probability that their first born will have the sickle cell trait. Show your working.

29/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2015PP2QN03

A female with sickle cell trait marries a normal man. The allele for sickle cell is HbS and the normal allele is HbA. Determine the probability that their first born will have the sickle cell trait. Show your working..

Picture
ANSWERS
Picture
Comments

State two examples of discontinuous variation.

29/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2015PP2QN03

State two examples of discontinuous variation.

Picture
ANSWERS
​ (i) Sex;
(ii) ABO blood group system/Rhesus factor;
(iii) Ability to roll tongue;
(iv) Free or attached earlobe;
(v) Presence/ absence of hair in the nose! on the ear pinna;
(vi) Finger prints; ability to taste PTC (phenythiocarbamide) PTV (phenylthio urea)
(vii) Winglength in prosophila;
(viii) Size of abdomen in drosophila;
(ix) Eye colour in prosophila;
(x) Smooth/wrinkled seed coats in pea plants;
(xi) Green/yellow seed coats/seed coat colour in pea plants;
(xii) Polymorphism/melanic and non melanic forms in moths.
Comments

What is meant by the term genetics?

29/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2015PP2QN03

What is meant by the term genetics?

Picture
ANSWER
  •  Branch of Biology that deals with the study of inheritance and variation.
Comments

K.C.S.E Biology Q & A - MODEL 2015PP1QN04

29/6/2020

Comments

 

K.C.S.E Biology Q & A - MODEL 2015PP1QN04

Colour blindness is a sex linked trait controlled by a recessive gene b. If a mother is a carrier and the father is normal, what is the chance that their son will be colour blind? Show your working. 
Picture
answers
Picture
Picture
Comments

Explain why people with sickle cell trait have an adaptive survival advantage over normal individuals in malaria endemic regions.

28/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2014PP2QN04

Explain why people with sickle cell trait have an adaptive survival advantage over normal individuals in malaria endemic regions.

Picture
answers
  •  People with sickle cell trait are resistant to malaria; because the plasmodium cannot survive in sickle shaped red blood cells.
Comments

Differentiate between sickle cell anaemia and sickle cell trait.

28/6/2020

Comments

 
K.C.S.E Biology Q & A - MODEL 2014PP2QN04

Differentiate between sickle cell anaemia and sickle cell trait.

Picture
answers
  •  Sickle-cell trait is heterozygous while sickle cell anaemia is a homozygous condition; 
Comments
<<Previous

    TOPICS


    FORM 1
    INTRODUCTION TO BIOLOGY
    CLASSIFICATION
    CELL   PHYSIOLOGY
    NUTRITION IN PLANTS AND ANIMALS
    THE CELL

    Form 2

    EXCRETION AND HOMEOSTASIS
    GASEOUS EXCHANGE
    RESPIRATION
    TRANSPORTATION IN PLANTS AND ANIMALS

    Form 3

    ECOLOGY
    GROWTH AND DEVELOPMENT
    REPRODUCTION IN PLANTS AND ANIMALS

    Form 4

    EVOLUTION
    GENETICS
    RESPONSE AND CO-ORDINATION
    SUPPORT AND MOVEMENT IN PLANTS AND ANIMALS
    ARCHIVES

    Archives

    January 2025
    November 2020
    October 2020
    August 2020
    July 2020
    June 2020
    May 2020
    April 2020
    September 2019
    August 2019
    October 2015

    CATEGORIES

    Categories

    All
    1995
    1996
    1997
    1998
    1999
    2000
    2001
    2002
    2003
    2004
    2005
    2006
    2007
    2008
    2009
    2010
    2011
    2012
    2013
    2014
    2015
    2016
    2017
    2018
    2019
    Animals
    BIOLOGY ESSAY
    BLOOD CELLS
    CELL PHYSIOLOGY
    CHARACTERISTICS OF LIVING THINGS
    CLASSIFICATION
    Co-ordination
    DASHBOARD
    DISEASES
    DNA
    Ecology
    EVOLUTION
    EXCRETION ANS HOMEOSTATIS
    FORM 1
    FORM 2
    FORM 3
    Form 3 Level
    FORM 4
    FUNGI
    GASEOUS EXCHANGE
    GENETICS
    GERMINATION
    GROWTH AND DEVELOPMENT
    HIV/AIDS
    HORMONES
    INTRODUCTION TO BIOLOGY
    METABOLISM
    NUTRITION
    OSMOSIS
    PAPER 1
    PAPER 2
    PHOTOSYNTHESIS
    PHOTOTROPISM
    PLANT CELLS
    POLLINATION
    REPRODUCTION IN ANIMALS
    REPRODUCTION IN PLANTS AND ANIMALS
    RESPIRATION
    Response And Co Ordination
    SECTION A
    SECTION B
    SECTION C
    Support And Movement In Plants And Animals
    TAXONOMY
    THE CELL
    Theory Of Inheritance Of Acquired Characteristics
    TRANSPORT IN PLANTS
    TRANSPORT IN PLANTS AND ANIMALS

    RSS FEEDS

    RSS Feed

atika school app
Download our Android App

Primary Resources
  • K.C.P.E Past Papers
  • ​Pri - Primary 1 Level
  • Pri  - Primary 2 Level
  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Standard 5
  • Standard 6
  • Standard 7
  • Standard 8
  • English
  • Kiswahili
  • Social Studies
  • Science
  • Mathematics
  • Kenya Sign Language
  • I.R.E
  • ​H.R.E
  • Notes
  • Termly Questions
  • Mocks
  • K.C.P.E Past Papers
College Resources
  • E.C.D.E
  • P.T.E
  • D.T.E
  • Technical Diploma
  • Technical Certificate
  • Business Diploma
  • Business Certificate
  • Higher Diploma
  • K.A.S.N.E.B Resources
  • K.M.T.C Resources
  • Varsity Resources
Secondary Resources
  • K.C.S.E Past Papers
  • Form 1
  • Form 2
  • Form 3
  • Form 4
  • Term 1
  • Term 2
  • Term 3
  • English
  • Geography
  • History
  • C.R.E
  • I.R.E
  • ​H.R.E
  • Home Science
  • Computer Studies
  • Business Studies
  • Agriculture
  • Chemistry
  • Biology
  • Physics
  • Mathematics ALT A
  • Mathematics ALT B
  • Kiswahili
  • French
  • Germany
  • Arabic
  • Aviation
  • Art & Design
  • Drawing & Design
  • Building & Construction
  • Metal Works
  • Wood Work
  • Music
  • Kenya Sign Language
  • Electricity
Other Useful Links
  • Academic Environment
  • How its Done
  • News and Opinions
  • Manyam Franchise Support
  • About
  • SITEMAP
  • FOCUS A365 SERIES
  • Membership Details (KCPE/KCSE)
  • Secondary Mocks
  • SYLLABUS
Contact Us

    Send Us a Message

    Max file size: 20MB
Submit
Manyam Franchise
P.O Box 1189 - 40200 Kisii
Tel: 0728 450 424
Tel: 0738 619 279
Tel: 0763 450 425
E-mail - sales@manyamfranchise.com
Photo used under Creative Commons from Ben Taylor55
  • Home
    • Atika School Advanced Search
    • News and Opinions
    • Echo
    • Academic Environment
    • How its Done
    • SITEMAP
    • About Us? >
      • About Us
      • Learn more about us
  • TUTORIALS
    • SECONDARY >
      • SCIENCES >
        • FOCUS MATHEMATICS TUTORIALS AND EXAMS FREE
        • KCSE BIOLOGY NOTES
        • FREE KCSE CHEMISTRY NOTES
        • KCSE PHYSICS NOTES, AUDIOVISUALS AND MORE
      • LANGUAGES >
        • ENGLISH >
          • English KCSE Set Books
          • ENGLISH GRAMMAR #KCSE
        • CHOZI LA HERI - MWONGOZO
        • KIGOGO - MWONGOZO
        • KCSE Kiswahili
      • TECHNICALS >
        • KCSE BUSINESS STUDIES NOTES
        • kcse Computer Studies Notes
        • KCSE AGRICULTURE NOTES, SYLLABUS, QUESTIONS, ANSWERS, SCHEMES OF WORK AND OTHERS
      • HUMANITIES >
        • KCSE History Notes Form 1 to 4
        • FREE KCSE CRE NOTES
        • KCSE GEOGRAPHY NOTES
        • IRE NOTES, AUDIOVISUAL, QUESTIONS AND ANSWERS
    • MASOMO VIDEOS
    • PRIMARY >
      • NOTES >
        • KISWAHILI
        • SOCIAL STUDIES >
          • STANDARD 4: SOCIAL STUDIES
        • SCIENCE
        • ENGLISH >
          • KCPE and Primary Level Compositions
        • MATHEMATICS >
          • KCPE Mathematics Notes
      • EXAMINATIONS >
        • DecaTurbo Online Series Examinations
        • TOP INSHA AND COMPOSITION QUESTIONS
        • CBC Kiswahili
        • FOCUS A365 SERIES K.C.P.E EXAMINATIONS FOR PRIMARY
        • Standard 8 (std) English Topical Questions
      • SYLLABUS >
        • Primary Mathematics Syllabus
  • CURRICULUM
    • NEW CURRICULUM DESIGNS >
      • PRIMARY >
        • PRE PRIMARY ONE CURRICULUM WITH SYLLABUS
        • PRE PRIMARY TWO CURRICULUM WITH SYLLABUS
      • SECONDARY >
        • KNEC KCSE SYLLABUS AND COURSE OUTLINES
      • COLLEGE >
        • Regulations for the TIVET Craft and Diploma Business Examinations
  • PRODUCTS
    • All Categories
    • FREE DOCUMENTS
    • PRIMARY CBC BASED RESOURCES
    • PRIMARY 8-4-4 BASED RESOURCES >
      • STANDARD 8 RESOURCES
    • COLLEGE & VARSITY RESOURCES
    • HIGH SCHOOL RESOURCES
    • FREE NOVELS >
      • COURSE BOOKS
      • KCSE KISWAHILI SETBOOKS
    • Backed Up Files and Archives
  • EXAMINATIONS
    • PRIMARY EXAMS >
      • Assignments and Random Exams
      • 8-4-4 >
        • STANDARD 8 PAST PAPERS 8-4-4 BASED
      • CBC
    • TOP SCHOOLS EXAMINATIONS LATEST >
      • Assignments and Random Exams
    • KCPE >
      • KCPE PAST PAPERS AND ANSWERS
    • KCSE >
      • KCSE BY SUBJECT >
        • KCSE PAST PAPERS BY SUBJECT
        • Free KCSE Past Papers Mathematics
        • Free KCSE Biology Questions and Answers
      • KCSE BY YEAR >
        • KNEC KCSE PAST PAPERS, MARKING SCHEMES, QUESTIONS & ANSWERS
    • QUESTIONS & ANSWERS >
      • SECONDARY >
        • LANGUAGES >
          • ENGLISH POETRY QUESTIONS WITH ANSWERS FOR K.C.S.E CANDIDATES
        • TECHNICALS >
          • COMPUTER STUDIES >
            • COMPUTER STUDIES Q & A
            • kcse computer studies paper 2 AND 3 Questions & Answers
          • BUSINESS STUDIES QUESTIONS & ANSWERS
          • KCSE AGRICULTURE TOPICAL QUESTIONS
          • KCSE HOME SCIENCE DIRECT QUESTIONS AND ANSWERS
        • SCIENCES >
          • KCSE Mathematics Topical Questions
          • KCSE Biology Topical Questions and Answers
          • CHEMISTRY TOPICAL QUESTIONS AND ANSWERS
          • KCSE Physics Topical Questions
          • KCSE physics Practical Sample Quiz
        • HUMANITIES >
          • ISLAMIC RELIGIOUS EDUCATION (IRE) QUESTIONS AND ANSWERS
          • C.R.E (CRE) QUESTION AND ANSWERS
          • KCSE History Topical Questions and Answers
          • GEOGRAPHY TOPICAL QUESTIONS AND ANSWERS
      • PRIMARY >
        • Standard 4-8 Mathematics Topical Questions from Mocks and KCPE
        • Std 6 Mathematics Notes
  • HIGH INSTITUTIONS
    • EXAMINATIONS >
      • College and Varsity Past Papers online >
        • College and Varsity Past Papers online
    • TUTORIALS
  • PRICING
  • BLOGS
    • Contact
    • Help & Support
    • MPESA FORM
  • Search Free Documents (PDF)