What are the expected phenotypic ratios for the following cross: A/a: B/B : C/c x A/a...
What are the expected phenotypic ratios for the following cross:
A/a: B/B : C/c x A/a : b/b : C/c? Assume all genes are unlinked and are not in the same chemical pathway. Assume that genes A and B show complete dominance but gene C shows codominance.
Homework Answers
Answer- First of all we will make gametes and then carry out cross between them and then we will find out phenotypic ratio.
No. of gametes in multihybrid crosses= 2n
here, n = number of heterozygous gene pairs
In both these genotypes, number of heterozygous gene pairs =2
Therefore number of gametes produced by each genotype = 2 ×2= 4.
Gametes produced by A/a:B/B:C/c will be-
- ABC
- ABc
- aBC
- aBc
Gametes produced by A/a:b/b:C/c will be-
- AbC
- Abc
- abC
- abc
Punnet square of cross-
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