A heterozygous blue-nose pit bull breeds with another blue nosed pit bull. Their
litter contains 2 puppies with black noses. What are the genotypes of the parents?

Bb and bb

Explanation:

one parent might be a carrier of the black-nose gene and the other parent is not OR both parents can be carriers of the black-nose gene.

answer; (phospholipid);

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.