Exam 21: Human Development and Genetics

A gene is a specific part of ____ and is the genetic code for one ____.

The umbilical arteries contain blood that has a high level of:

A human cell contains how many pairs of autosomes?

Homologous chromosomes are a pair of chromosomes that may also be called:

Genetics problem: Mom is heterozygous for type A blood and Dad is homozygous for type B blood.The chance that their child will have type A blood is:

For the embryo,the yolk sac:

The genetic code in the nucleus of a cell is contained in the ____________________ of the ____________________.

The sex chromosomes in women are called:

In the gestation period,the period of embryonic growth lasts:

A pair of chromosomes that has maternal and paternal genes for the same traits is said to be a ____ pair.

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind.What is the chance that their daughter will be a carrier?

In order for a dominant trait to appear in a person's phenotype,the person must have ____________________ gene(s)for it.

Mom and Dad have two sons and two daughters.One son is red-green color-blind.What does this tell us about Mom and Dad?

If a trait may appear in a person's phenotype when only one gene is present for it,the trait is called ____________________.

The genes a person has for a particular trait are called the ____________________.

Which statement is NOT true of the embryonic membranes?

Genetics problem: Dad is red-green color-blind,and Mom is not a carrier.The percent chance that a son will NOT be color-blind is ____________________ and that a daughter will NOT be a carrier is ____________________.

The genetic code for one protein is called a(n)____________________.

During pregnancy,an important function of progesterone is to inhibit contractions of the ____________________ of the uterus.

The average human gestation period is ____________________ weeks.