In chickens, cock feathering is an autosomal recessive trait that is limited to males. Is it possible to cross a cock-feathered male with a hen-feathered female and get male progeny that are cock-feathered? Explain your reasoning.

The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome.  Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). An ash-red male pigeon mated with a blue-black female pigeon.Is it possible to obtain a brown male pigeon? Answer (choose one from the picture ).

A human female who is heterozygous for the recessive, sex-linked trait causing red-green color blindness, marries a normal male. What proportion of their male progeny will have red-green color blindness?

In pea plants, flower color is determined by one gene with two alleles, with the allele coding for purple flowers (P) being dominant to the allele coding for white flowers (p). If two purple-flowered offspring resulting from a cross between homozygous dominant and white-flowered parents are crossed, what percentage of the progeny are expected to have the dominant phenotype?

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. Is it possible to cross two bearded goats and obtain a beardless male offspring? Why or why not? What about a bearded female offspring?

In this pedigree, which parents-child pair allows you to reject the hypothesis of X- linked dominant as an inheritance pattern? If there are more than one pair, just pick one possibility. Be careful that the person is really a child. Specify generation and number. Use the notation format "I1-|11" II 12 3 III 1 3. 6. 7 8 9.