For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable?
a) it is safe enough to limit all apoptosis
b) it does not alter metabolically active cells
c) it only attacks cells that are density dependent
d) it interferes with cells entering g0
e) it interferes with rapidly dividing cells

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?