If one parent is heterozygous white (ww) and the other is homozygous black (ww), give the phenotype and genotype ratios for this cross.
phenotype:
a. 1/3 black ; 2/3 white
b. 1/2 white ; 1/2 black
c. 3/4 white ; 1/4 black
d. 2/3 black ; 1/3 white

genotype ratio ww: ww
a. 2: 1
b. 1: 2
c. 1: 1
d. 3: 1

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

What pattern of migration do whales follow?