Choose the true statement about genome size and gene number in animals.
A)There is a strong correlation between the number of genes and genome size.
B)Much of the extra DNA in humans is in the form of exons.
C)The pufferfish has a larger genome than humans and more genes.
D)Genome size differences depend to a large extent on the amount of retrotransposon DNA present.

Question

Quizplus · Accepted Answer

Genome size differences in animals are largely due to variations in the amount of repetitive DNA, with retrotransposons being the most common type. While the number of genes may vary between species, it does not necessarily correlate with genome size. The human genome contains more non-coding DNA than coding DNA, and most of the non-coding regions are not exons. The pufferfish has a smaller genome than humans, but it contains more genes due to a higher gene density.

Choose the True Statement About Genome Size and Gene Number