Need with 2c. describe what would happen over time to a tree sapling that could grow only taller not wider.

It would grow a certain amount before the top of the tree grew to heavy for the bottom and would topple over

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.