Exam 2: The Beginning: From Conception to Birth

When a person inherits a recessive gene that is not expressed in the phenotype,that person is a carrier of the gene.

_____ is the term for a baby whose birthweight is significantly lower than expected,given the time since conception.

The process of methylation can do all the following to genetic instructions EXCEPT _____ them.

Consultation and testing by trained experts that enable individuals to learn about their genetic heritage,including harmful conditions they could pass along to any children they might conceive,is referred to as "couples counseling."

Genes with various repeats or deletions of base pairs are called "_____."

Males have one X and one Y on:

Agents and conditions that can harm the prenatal brain,impairing the future child's intellectual and emotional functioning,are called "_____ teratogens."

On the 23rd pair of chromosomes,females have:

A newborn's involuntary response to a particular stimulus is called a(n)"_____."

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:

A fatal central nervous system disorder caused by more than 35 repetitions of a particular set of three base pairs is:

_____ is the name for a developing human organism from about the third week through the eighth week after conception.

Research indicates that alcoholism is caused by:

Melissa and Brandon are having a baby and are hoping for a boy.The baby's sex will be decided by the chromosomes of:

About one in every _____ infants is born with only one sex chromosome or with three or more,which creates a chromosomal abnormality.

Epidurals,often used in hospital births to manage pain during childbirth,have been shown to:

Males inherit X-linked disorders from the _____.

Which of the following structures develops FIRST during the period of the embryo?

All important human characteristics are _____,including diseases known to be inherited.

A small section of a chromosome that instructs the cell to manufacture proteins needed to sustain life and development is the: