Exam 2: Heredity and Prenatal Development

Approximately how many sperm cells are contained in the average ejaculation of semen?​

How would one identify a person with Down's syndrome?​

The typical sex chromosome pattern for females is _____.

Rh incompatibility occurs when an Rh-positive woman is carrying an Rh-negative fetus.

Which of the following is considered a multifactorial problem?​

Chromosomes are _____ structures found in cells.

In the structure of deoxyribonucleic acid (DNA), which of the following bases combine with thymine?

Monozygotic (MZ) twins share _________ percent of their genes.

Deoxyribonucleic acid (DNA) takes the form of a:

After meiosis, each new cell nucleus contains _____ chromosomes.

The determination of a child's sex depends on the:​

Humans begin life as a single cell that divides repeatedly. This cell is known as a(n):

The embryo and fetus develop within a protective _________ in the uterus.

A human zygote contains _____ pairs of autosomes.

Sebaceous glands cause a developing organism to grow arms or wings, skin or scales.

_________ is a fatal genetic neurologic disorder whose onset is in middle age.

According to a survey by Adhikari & Liu in the year 2013, at birth, women have:​

Before meiosis, a sperm cell:

Twins that derive from a single zygote that has split into two are called:

The _________ is the hollow organ within females in which the embryo and fetus develop.