Assume hair color in yaks has incomplete dominance. Individuals with a BB genotype have black hair...
Assume hair color in yaks has incomplete dominance. Individuals with a BB genotype have black hair and individuals with a bb genotype have white hair. Which of the following crosses will result in the same number of genotypes and phenotypes in the F1 generation?
Group of answer choices
a Both of these crosses will result in the same number of genotypes and phenotypes in the F1 generation
b Neither of these crosses will result in the same number of genotypes and phenotypes in the F1 generation
c Bb x Bb
d bb x bb
Homework Answers
Right answer is A.
explanation:
It is given that B allele is showing incomplete dominance to b allele. This suggests that Bb will give grey color in heterozygous condition.
Cross 1:
Parents: Bb × Bb
Punnet square:
| Gametes | B | b |
| B | BB ( black) | Bb ( grey) |
| b | Bb ( grey) | bb ( white) |
Genotype number : BB (1): Bb (2): bb (1)
Phenotype number : Black (1): Grey (2): white (1)
That's why same genotype and phenotype is obtained.
---
cross 2:
parents bb × bb
punnet square:
| Gametes | b |
| b | bb ( white) |
Phenotype: white (1)
Genotype: bb (1)
---
That's why right answer is a.
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