Exam GED Section 3 Science topic 1 question 20 discussion

Actual exam question from Test Prep's GED Section 3 Science

Question #: 20
Topic #: 1

In humans, a pair of chromosomes (one from each parent) determines the sex of the baby. Females have two X chromosomes, while males have an X and a Y chromosome. The baby always gets an X chromosome from the mother, so in humans, the father determines the sex of the baby by supplying it with either an X chromosome to make it female, or a Y chromosome to make it male. In birds, like in humans, a pair of chromosomes determines the sex. Birds with two W chromosomes are male. Birds with a W chromosome and a Z chromosome are female. Which statement is true about birds?

A. The male bird determines the sex of the offspring by supplying it with the W or the Z chromosome.
B. The male bird determines the sex of the offspring by supplying it with one of its W chromosomes.
C. The male bird determines the sex of the offspring by supplying it with the X or the Y chromosome.
D. The female bird determines the sex of the offspring by supplying it with the X or the Y chromosome.
E. The female bird determines the sex of the offspring by supplying it with the W or the Z chromosome.

Show Suggested Answer

Suggested Answer: E 🗳️
In humans, the sperm determines the sex of the child because the male has two different chromosomes. In birds, the female has two different chromosomes, so she determines the sex of the offspring. Birds have Ws and Zs, not Xs and Ys like humans, so choice d is incorrect.

by [deleted] at March 9, 2025, 4:12 p.m.

Comments

Submit Cancel

Currently there are no comments in this discussion, be the first to comment!