Genetic problems

In cats, fluffy is dominant to silky and chubby is dominant to skinny.

1. One parent is homozygous silky and homozygous chubby. The other parent is heterozygous for all traits. What percentage of the offspring may be fluffy and thin?

2. One parent is homozygous fluffy and heterozygous chubby and the other is homozygous silky and heterozygous chubby.
   1. What percent of their offspring could be fluffy and chubby?
   2. What percent of the offspring could be homozygous for fluffiness?
   3. What percent of the offspring could be homozygous for chubbiness?
3. Both parents are heterozygous for both traits
   1. What fraction of the offspring could have the exact same genotype as the parents?
   2. What fraction of the offspring could have the same phenotype as the parents?

In eagles, bald is dominant to feathers and loner is dominant to groupie.

4. One parent is heterozygous bald and homozygous loner. The other is homozygous recessive for both traits.
   1. What percentage of the offspring may be feathered loners?
5. One parent is homozygous dominant for both traits and the other is homozygous recessive for both traits.
   1. What percentage of the offspring may be bald groupies?
   2. What percentage of the offspring may be heterozygous for both traits?
6. One parent is homozygous bald and homozygous groupie. The other is heterozygous for both traits.
   1. What percentage of the offspring may be homozygous bald and heterozygous loners?
   2. What percentage of the offspring may be feathered groupies?

An aquatic arthropod called a Cyclops has antennae that are either smooth or barbed. The allele for barbs is dominant. In the same organism, resistance to pesticides is a recessive trait.

 

7. Make a "key" to show all the possible genotypes (and phenotypes) of this organism.