- Use the Punnett square application to determine the answers for questions 26 and 27 in the following simple monohybrid cross. (If you don’t understand how to fill in a Punnett square, you can use google for help.): A man who is homozygous recessive for attached earlobes (ee) has children with a woman who is heterozygous for attached/unattached earlobes (Ee). Use E for unattached lobes and e for attached lobes. Identify the alleles that would be entered for the female and for the male.
- What percentage of the offspring are expected to show the recessive phenotype?
- Use the Punnett square application to determine the answers for questions 28, 29 and 30 for the following simple monohybrid cross. (If you don’t understand how to fill in a Punnett square, you can use google for help.): A man who is heterozygous for cleft chin has children with a woman who is also heterozygous for cleft chin. Use C for the cleft chin allele and c for the non-clefted chin allele. The allele for cleft chin is dominant. Identify the alleles for the female and the male.
- What percentage of the offspring are expected to show the dominant phenotype?
- What percentage of the offspring are expected to have a heterozygous genotype?