In guinea pigs two genes have the following alleles - VCE - SSCE Biology - Question 8 - 2006 - Paper 1
Question 8
In guinea pigs two genes have the following alleles.
Gene 1: hair length
S : long hair
s : short hair
Gene 2: hair type
W : straight hair
w : wavy hair
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Worked Solution & Example Answer:In guinea pigs two genes have the following alleles - VCE - SSCE Biology - Question 8 - 2006 - Paper 1
Step 1
A. more with long, wavy hair than short, wavy hair.
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Answer
This outcome is unlikely because if the genes are linked, we would expect parental types to be more frequent than recombinant types.
Step 2
B. more with short, straight hair than short, wavy hair.
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Answer
Similar to option A, this would not be the expected outcome if the genes are close together on the same chromosome.
Step 3
C. approximately equal numbers of long, straight hair and long, wavy hair.
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Answer
This is not likely since the expected ratios due to linkage would not produce equal numbers of these phenotypes.
Step 4
D. approximately equal numbers of long, straight hair and short, wavy hair.
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Answer
This option is the correct answer as it suggests that if the genes are close together, the offspring will show similar frequencies for these traits.
