Question 1

Which of the following correctly lists the three layers of the uterine wall from innermost to outermost?

Accepted Answer

Endometrium, myometrium, perimetrium

Question 2

A male inherits an X-linked recessive disorder from his mother. What is the probability that a son of a carrier mother and an unaffected father will inherit the disorder?

Accepted Answer

$$\frac{1}{2}$$

Question 3

How many chromosomes are present in a human cell after meiosis I is completed?

Accepted Answer

23 chromosomes, each with two chromatids

Question 4

Which structure forms immediately after fertilization and undergoes rapid mitotic divisions?

Accepted Answer

Zygote

Question 5

Which of the following tissues is derived from the ectoderm germ layer?

Accepted Answer

Nervous tissue

Question 6

What is the primary function of the chorion during pregnancy?

Accepted Answer

Facilitates exchange of nutrients and gases between mother and fetus

Question 7

Dizygotic twins are best described as:

Accepted Answer

Twins resulting from two separate eggs fertilized by two separate sperm

Question 8

Which of the following is a common cardiovascular change experienced by pregnant women?

Accepted Answer

Increased blood volume

Question 9

Which secretion is produced by mammary glands immediately after childbirth and is rich in antibodies?

Accepted Answer

Colostrum

Question 10

What is the primary hormonal reason for the onset of puberty?

Accepted Answer

Increased secretion of gonadotropin-releasing hormone (GnRH)

Question 11

Which of the following best distinguishes genotype from phenotype?

Accepted Answer

Genotype is the genetic makeup; phenotype is the observable trait

Question 12

A patient presents with the following symptoms: tall stature, gynecomastia, and small testes. Which chromosomal disorder is most likely?

Accepted Answer

Klinefelter syndrome

Question 13

If two heterozygous parents for a trait (Aa) have a child, what is the probability the child will be homozygous recessive (aa)? Use a Punnett square to solve.

Accepted Answer

$$\frac{1}{4}$$

Question 14

Which of the following correctly describes the sequence of events during the fetal delivery process?

Accepted Answer

Dilation, expulsion, placental

Question 15

Which structure in the developing embryo is the first to demonstrate rhythmic contractions, indicating the beginning of heart development?

Accepted Answer

Primitive heart tube

Question 16

Braxton Hicks contractions are best described as:

Accepted Answer

Irregular, painless uterine contractions that do not result in labor

Question 17

Which of the following is NOT a stage of labor?

Accepted Answer

Implantation

Question 18

A female with a single X chromosome (45, X0) is most likely to have which syndrome and which symptom?

Accepted Answer

Turner syndrome; short stature

Question 19

Which of the following best explains why Down syndrome occurs?

Accepted Answer

Nondisjunction leading to trisomy 21

Question 20

Which of the following is a real-life example of a sex-linked trait?

Accepted Answer

Hemophilia

Chapter 27: Study Guide for Human Development and Inheritance

Study Guide - Practice Questions

Study Guide - Flashcards