Comparable segments of the mitochondrial dna sequences of two similar species are shown below. this segment of dna mutates at a rate of one base pair per 33 million years. based on these dna sequences, how long ago did the two species diverge from a common ancestor?

species a mtdna sequence: tacaagatac
species b mtdna sequence: tacgcgtaac

a. 99 million years ago
b. 33 million years ago
c. 66 million years ago
d. 132 million years ago

Whay is the following best defines climate

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?

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. agouti x albino a) 1/2 albino, 1/2 agouti b) all agouti c) 3/4 agouti, 1/4 albino