A trihybrid cross is a cross between two individuals who are heterozygous for three genes. For example: AaBbCc x AaBbCc. Assumin
g these three genes are unlinked and assorting independently, what segregation ratio would be observed?
1 answer:
Answer:
27:9:9:9:3:3:3:1
Explanation:
The gametes of the parental genotypes would be
ABC, ABc, AbC, aBC, Abc, aBc, abC, abc
The cross between AaBbCc and AaBbCc will result into following offspring (image is also attached)
ABC ABc AbC aBC Abc aBc abC abc
ABC AABBCC AABBCc AABbCC AaBBCC AABbCc AaBBCc AaBbCC AaBbCc
ABc AABBCc AABBcc AABbCc AaBBCc AaBbcc AaBBcc AaBbCc AaBbcc
AbC AABbCC AABbCc AAbbCC AaBbCC AAbbCc AaBbCc AabbCC AabbCc
aBC AaBBCC AaBBCc AaBbCC aaBBCC AaBbCc aaBBCc aaBbCC aaBbCc
Abc AABbCc AABbcc AAbbCc AaBbCc AAbbcc AaBbcc AabbCc Aabbcc
aBc AaBBCc AaBBcc AaBbCc aaBBCc AaBbcc aaBBcc aaBbCc aaBbcc
abC AaBbCC AaBbCc AabbCC aaBbCC AabbCc aaBbCc aabbCC aabbCc
abc AaBbCc AaBbcc AabbCc aaBbCc Aabbcc aaBbcc aabbCc aabbcc
The genotype ratio is 27:9:9:9:3:3:3:1
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