Igcse Model Questions Vol1 2021 Biology Question 10

Practice essay / theory question 10 from the 2021 Igcse Model Questions Vol1 Biology examination. This question covers Linkage and recombination, Pedigree analysis of autosomal recessive disorders, Molecular techniques – PCR and gel electrophoresis .

Igcse Model Questions Vol1 2021 Biology Essay / Theory

Topics: Linkage and recombination Pedigree analysis of autosomal recessive disorders Molecular techniques – PCR and gel electrophoresis

Question 10 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

Genetics explores how traits are transmitted and how modern techniques can detect genetic variation. Answer the following questions.

Question Parts

( a )

Two genes, A and B, are located on the same chromosome with a recombination frequency of 20 %. An individual heterozygous for both genes (genotype AaBb) is in coupling phase (chromosome 1 carries AB, chromosome 2 carries ab). This individual is crossed with a homozygous recessive aabb. Calculate the expected phenotypic ratio of the offspring, assuming A and B are each dominant over a and b respectively.

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This is Igcse Model Questions Vol1 2021 Biology Question 10. It is one of the essay questions from the 2021 Igcse Model Questions Vol1 Biology examination.

The question covers Linkage and recombination, Pedigree analysis of autosomal recessive disorders, Molecular techniques – PCR and gel electrophoresis .

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