In several mammals, including some rat and shrew species, the presence of two X chromosomes means the animal will be a female, whereas having just one X chromosome dictates maleness. This type of sex determination is most similar to
A) other mammals.
B) insects.
C) bees.
D) birds.

Question

Quizplus · Accepted Answer

Insects also have a similar type of sex determination where the presence of two X chromosomes results in a female and one X chromosome results in a male. This is known as haplodiploid sex determination. Birds have a ZW sex determination system where males have two Z chromosomes and females have a Z and a W chromosome. Other mammals have XY sex determination where males have an XY pair and females have an XX pair. Bees have a more complex system of sex determination where females have two sets of chromosomes (diploid) while males are haploid and have only one set of chromosomes.

In Several Mammals, Including Some Rat and Shrew Species, the Presence