ACHIEVE:INTRO TO GENETIC ANALYSIS 1TERM
12th Edition
ISBN: 9781319401399
Author: Griffiths
Publisher: MAC HIGHER
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Chapter 3, Problem 41P
a.
Summary Introduction
To determine: The alleles that are dominant in the given cross.
Introduction. The different forms of allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that accounts for the change in appearance of genetically similar organisms.
b.
Summary Introduction
To determine: The most probable genotypes for the parents in each cross.
Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.
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Answer Bank
A pure breeding strain of squash that produced disk-shaped fruits was crossed with a pure- breeding strain having long fruits. The first filial generation had disk fruits, but the second filial generation showed a new phenotype, sphere, and was composed of the following proportions: disk 270, sphere 178, long 32. Propose an explanation for these results, and show the genotypes of P, First filial generation and second filial generation.
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Chapter 3 Solutions
ACHIEVE:INTRO TO GENETIC ANALYSIS 1TERM
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