After many cell divisions, a segment of DNA has more base pairs than it originally did. Make a claim about how this could happen. Summarize evidence to support the claim and explain your reasoning.

It could happen through mutation

Explanation:

A segment of DNA after many cell divisions could have more base pairs than it originally did as a result of mutation.

Mutation is generally defined as a sudden change to the DNA sequence of a cell. This change could be of difference forms, including:

Addition of basesDeletion of basesSubstitution of bases

Addition of bases to a DNA will generally lead to a longer base pairs in the DNA, deletion will lead to a shorter base pairs while substitution will only lead to a change in the base sequence without any change in the length of the DNA.

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.