Chapter 22, Problem 43A

Summary Introduction

To predict: The checker pattern of feathers (P) I dominant to the non checker pattern (p). suppose a checker pattern with the genotype (Pp) mates with non checker pigeon.

Introduction: Punnett square is used to determine the potential offspring of a cross between two recognized genotypes. Punnett squares allow the identification of different genotypes included in a cross.

Explanation of Solution

The allele present in the checker pattern of pigeon’s feather is represented by P.

The allele that represents non checker pattern of the pigeon feathers is p.

Now, the checker pigeon with genotype Pp mates with non-checker pigeon with genotype pp.

According to Punnett square,

	P	p
p	Pp	pp
p	Pp	pp

Conclusion

Thus, the genotypic ratio of the offspring produced by the checker pigeon with genotype Pp mates with non-checker pigeon with genotype pp is 2:2.