Exam 2: The Beginning: From Conception to Birth

The interaction of a heterozygous pair of alleles in such a way that the phenotype reflects one allele more than the other is referred to as a "_____."

The first 22 chromosomes contain hundreds of genes in the same positions and sequence.If the code of the gene from one parent differs from the code on the same gene from the other parent,the gene pair is _____.

Brad learned in his college biology class that,with respect to the sex chromosomes,the:

Malek gained weight and experienced nausea when his wife,Brenda,was pregnant.Malek experienced _____.

Drugs,viruses,pollutants,malnutrition,and stress during pregnancy are referred to as:

Low-birthweight is defined as a newborn weighing less than 2,500 grams.

Anya and her husband are considering having a baby.Anya's obstetrician recommends that she stop consuming alcohol and update her immunizations:

Consultation and testing by trained experts that enables individuals to learn about their heritability,including harmful conditions they could pass along to any children they might conceive,is referred to as:

Newborns born to migrants are generally healthier in every way,including birthweight,than newborns of U.S.-born women.This phenomenon is called the:

The genes on the chromosomes in the nucleus of each cell instruct the cell to manufacture the _____ needed to sustain life and development.

The first 22 chromosomes contain hundreds of genes in the same positions and sequence.If the code of the gene from one parent is exactly like the code on the same gene from the other parent,the gene pair is _____.

When the effects of genes combine to create the phenotype,they are called "_____ genes."

A common reason that couples do not seek genetic counseling is that:

The nations of sub-Saharan Africa have low rates of low-birthweight babies.

Genetic counseling may be MOST useful to parents at which of the following stages?

By the end of the ____ prenatal month,sex organs develop and are soon visible via ultrasound.

Fraternal twins are also called _____ twins.

In which of the following countries are home births MOST common?

Amber is pregnant and wants to ensure that she does everything she can to prevent the occurrence of a neural-tube defect in her child.She makes sure that she has the proper amount of _____ in her diet.

The strong,loving bond that forms as parents hold and feed their newborn is known as "couvade."