Exam 3: The New Genetics

Which female is more likely to naturally conceive dizygotic twins?

If the 23rd pair of chromosomes is _____, the individual will be female.

If the 23rd pair of chromosomes is _____, the individual will be male.

Almost every cell in the human body has 23 individual chromosomes.

Identical twins are also called _____ twins.

Sally and Tim were planning on starting a family. Sally's extended family has several sets of dizygotic twins. When speaking with their doctor, Sally asked what could cause her to have dizygotic twins. The doctor informed her that the likelihood of having dizygotic twins will be determined by _____.

The general term for the techniques designed to help infertile couples conceive and then sustain a pregnancy is in vitro fertilization (IVF).

Jeff and Ashley are fraternal twins. They are the result of _____ ovum/ova fertilized by two sperm.

When someone inherits a recessive gene that is not expressed, that person is a(n) _____ of that gene.

Describe how a one-celled zygote develops into a baby with 26 billion specialized cells due to the processes of duplication, division, and differentiation.

The statistic that indicates how much of the variation in a particular trait can be traced to genes is called _____.

Most of the known single-gene disorders are _____.

If the 23rd pair of chromosomes contains two X chromosomes, then that individual is a male.

As urbanization, video games, homework, and fear of strangers have kept more American children indoors, the rate of _____ has increased.

Down syndrome is also called _____.

What is one of the risks of commercial genetic testing?

In China, a "one-child" policy implemented in about 1979 cut the birth rate in half. Although the intended goal of reducing poverty was achieved, several unintended consequences were identified, including _____.

Michael is color-blind. His gene for color blindness is most likely a _____.

A person's genetic inherited potential is called the _____.

Almost every cell in the human body contains _____ chromosomes.