If a gene with two alleles, F and f, evolves so that the frequency of the recessive f = 1, what is the frequency of carriers? Enter your answer as a number with or without a decimal point.

In cows, there is a "splotchy" phenotype that is splotches of brown and white. A true-breeding white cow (homozygous recessive) is bred to a true-breeding brown cow (homozygous dominant). In the resulting offspring, 75% have spots of brown and white and 25% are brown. The phenotype described displays what kind of relationship(s) between alleles?     Incomplete penetrance Incomplete penetrance Variable expressivity Variable expressivity Incomplete dominance Incomplete dominance Codominance

Farah breeds and sells true-breeding black salamanders.  At a salamander convention, she purchased a single red salamander from a breeder who told her the red color was an autosomal recessive trait. Describe a breeding program Farah could use to establish a strain of all red salamanders to sell. Include the phenotypic and genotypic ratios of offspring in each generation (F1, F2, etc.). You may assume that Farah can get hundreds of offspring from each mated pair, and that it's ethically okay for sibling salamanders to mate.

You are trying to find a blood donor to help treat some of your patients. The C-yonce and Kay-Z have 3 children with blood types A , B, and O. The youngest with blood type O needs a transfusion and you're trying to figure out if either of the parents are a match so you test the parent genotypes. Note: Alleles for each blood type are expressed as follows: blood type A= I^A blood type B= I^B blood type O= i Hint: Remember that 2 alleles contribute to a persons blood type. Pay attention to dominant and recessive relationships among the alleles.     1-C-yonce is type B. What must her genotype be? 2-What must Kay-Z’s genotype be? 3-Which parent can give blood to their child ? 4-After running lab tests, it was discovered that the children's blood types were reported incorrectly.(This does not affect the genotypes entered for C-yonce and Kay-Z in the previous questions.) Their youngest actually has blood type AB, and still needs a blood transfusion.  Which parent can donate blood to the child…