A test cross was carried out to determine whether two genes, P and Z, are linked. The purple flowers allele, P, is dominant over white flowers, p. High starch, H, is dominant over low starch, h. A heterozygous F1 individual was crossed to a homozygous recessive tester genotype. The phenotypes of the progeny and the number of each phenotype are shown below:
Purple, high starch424
Purple, low starch69
White, high starch71
White, low starch436
a. What is the genotype of the F1 parent drawn on chromosomes?
b.State the type of linkage (cis or trans) that existed between the genes in the heterozygous parent.
c. Are the two genes linked?
d. If the two genes are linked, how far apart are they on the chromosome?
Purple, high starch424
Purple, low starch69
White, high starch71
White, low starch436
a. What is the genotype of the F1 parent drawn on chromosomes?
b.State the type of linkage (cis or trans) that existed between the genes in the heterozygous parent.
c. Are the two genes linked?
d. If the two genes are linked, how far apart are they on the chromosome?