Exam 2: Biological Foundations: Heredity, Prenatal Development, and Birth

A sperm cell contains a total of 22

During prenatal development, the arm develops before the fingers. This most illustrates the _____ principle.

Low birth weight can most effectively be prevented through

Genes and environments

Nonshared environmental influences tend to make siblings in a family more similar to each other.

The correct order of prenatal development is zygote to embryo to fetus.

A woman who consumes alcohol ________ has the greatest risk of giving birth to a baby with fetal alcohol syndrome.

The uniting of the egg and sperm (conception) typically takes place in the

When the chromosomes in a pair are the same, they are said to be heterozygous.

Pregnant women who fail to consume enough vitamin A are at risk for giving birth to a baby with spina bifida.

As dizygotic twins, Jewel and Bjork

Describe any two genetic disorders that involve abnormal chromosomes. Be sure to both identify the exact chromosomal aberration and the impact of the aberration on development.

Which statement is true?

The portion of the zygote that will eventually develop into the baby is called the _____.

Which event occurs following in vitro fertilization?

The ____ houses the blood vessels that join the embryo and its mother.

Linda has one allele for curly hair and another for straight hair. Linda's alleles are

Which organism can truthfully state, "It is during my time that all body parts and organs are first put into place?"

A doctor could best illustrate the proximodistal principle by discussing the fact that

As a behavioral geneticist, Juan would most likely be studying