Exam 3: The New Genetics

Each variation of a gene is called a(n) _____.

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

Brown-eyed Alma has a blue-eyed mother and a brown-eyed father. In this case, her brown eyes were determined by a(n) _____ allele.

When a baby is born, the zygote has become about _____ billion cells.

Couples can select the sex of a child by _____.

Ways in which chromosomal and genetic problems are relevant to human development include that _____.

Monozygotic twins have _____ percent of their genes in common.

Most of the known single-gene disorders are _____.

If the 23rd pair of chromosomes contains one X chromosome and one Y chromosome, then the individual is male.

The most common extra-chromosome condition is _____.

It is the mother's ovum that determines whether the developing baby will become a boy or a girl.

Alice loves to share information that she has learned from school with her parents. She came home one day and, at dinner, told her family that she learned about cell differentiation in science class. The information that she tells them is correct, so over dinner she told them that once cells differentiate _____.

Which type of twins originates from one zygote that splits apart?

The microbiome consists mostly of _____.

Michelle and Greg are having a baby and are hoping for a boy. What is responsible for determining the sex of the baby?

Each parent contributes a sex chromosome. Which statement about sex chromosomes is accurate?

A(n) _____ is one of the 46 molecules of DNA (in 23 pairs) that virtually every cell of the human body contains and that, together, contain all the genes.

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

The cognitive deficits caused by the genetic condition of _____ are the most common form of inherited intellectual disability.

Individuals have 23 _____ in every cell of the body.