Again, figure out the genotypes of the parents and what gametes they produce. Both gryphons are heterozygous though they have different alleles linked on their homologous chromosomes. Below are illustrations of two homologous pairs of chromosomes. Which belongs to the female and which to the male gryphon before crossing over occurs?

... and after crossing over?

What gametes will they produce now?

Now, perform a punnett square to determine what offspring will result.

Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

	BN	Bn	bN	bn
BN	BBNN	BBNn	BbNN	BbNn
Bn	BBNn	BBnn	BbNn	Bbnn
bN	BbNN	BbNn	bbNN	bbNn
bn	BbNn	Bbnn	bbNn	bbnn

Now, count up how many of the offspring have each genotype and phenotype .

Return to the question page and select the correct answers.