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Exam 3: The New Genetics

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Question 91

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

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nearsighte...

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Question 92

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

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Within hours after conception, a zygote ...

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Question 93

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

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

Down syndrome is also called _____.

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

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 _____.

What is one of the risks of commercial genetic testing?

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

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

Identical twins are also called _____ twins.

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

Most of the known single-gene disorders are _____.

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

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 _____.

Almost every cell in the human body contains _____ chromosomes.

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

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

Which female is more likely to naturally conceive dizygotic twins?

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