Exam 2: Genetics and Prenatal Development

Sandra Scarr and Kathleen McCartney proposed the theory of genotype < / font>environment effects.Which subtype occurs when people seek out environments that correspond to their genotypic characteristics?

You are pushing a stroller that has two babies in it.One boy,dressed in blue,and one girl,dressed in pink.Someone stops you tells you how beautiful your baby boy and girl are.Then they ask if they are "identical twins." You tell them they are not,but what are you thinking?

The ____ is / are the organ(s)that allow(s)nutrients to pass from the mother to the child and allow(s)waste to pass from the child to the mother during the course of pregnancy.

Women who gain less than 20 pounds are more likely to have babies who are _____.

Humans are born with immature brains that are incompletely developed.One result is that babies ______.

How many days into the woman's menstrual cycle does ovulation occur?

Why are males more likely to have X-linked inherited disorders?

The heritability estimate ranges from ____.

When the ovum is fertilized by the sperm,this is called ____.

Each form of a gene that is contained within a chromosome is referred to as a ____.

What percentage of their genes do dizygotic twins have in common?

Shantel is talking to her grandmother about how she is continuing her moderate exercise program while she is pregnant.However,Grandma warns her not to exercise because she holds the outdated belief,once common in developed countries,that Shantel is ____.

Infants born with the effects of rubella (German measles)within the United States have greatly decreased since the 1960s because ____.

The chromosomes that determine if a fetus will be male or female are known as the _____.

In most developing countries,motherhood is an essential part of a female's identity,and if infertility occurs,she may ____.

Dizygotic (DZ)twins are also known as _____.

Alejandro was born into a family with high musical talent.Both of his parents were professional musicians who encouraged and fostered his musical development.Throughout childhood,he practiced the guitar whenever he could and eventually became a professional musician himself.Which of the following best describes Alejandro's phenotype?

____ is / are described as behaviors,environments,and bodily conditions that could be harmful to a fetus.

According to ancient Mayan folklore,how can one predict if they are having a girl?

Why is aerobic exercise important to a pregnant woman? It helps to ____.