Suppose the aa genotype  results in deafness.  If two heterozygous parents had four children, then 

Which letter in a pyramid? 

The nurse cares for a client diagnosed with liver failure who reports bloating and tighness in their legs. The nurse notes generalized edema and ascites.  Which is most likely the cause?

In ____________, homozygosity for the recessive allele at one locus will mask the phenotypic expression of the alleles at a second locus. This leads to a 9:3:4 genotypic ratio. The relationship is shown in the figure below

Assuming three genes are incompletely linked, how many recombinant genotypes would you expect and at what frequency relative to independent assortment?

In fruit flies, the red eye allele (pr+) is dominant to the purple eye allele (pr) and the normal wings allele (vg+) is dominant to vestigial wing allele (vg). These loci are located on the same chromosome. A pure breeding red-eyed fly with vestigial wings was crossed with a pure-breeding purple-eyed fly with normal wings. All of the F1 progeny had a WT phenotype. Which of the following represents the arrangement of alleles on the F1’s chromosome?

Independent assortment predicts a 9:3:3:1 ratio with four different phenotypes in the F2 progeny.  If the alleles are epistatic, what would you predict?

The hairless allele (HL) in Mexican hairless dogs is dominant. A cross between two Mexican hairless dogs yields offspring which are 1/3 hairy and 2/3 hairless. What do these F1 ratios suggest about the hairless allele HL?

Choose the diagram illustrating the alleles on homologous chromosomes for the genotype DFg/DFG, assuming that the genes reside on the same chromosome in the order written.

What is the definition of high-level disinfection?