Exam 2: Genetics and Prenatal Development

Your roommate's sister-in-law is pregnant and is trying to do all that she can to protect her fetus and to make sure that her fetus develops well.She does not like to have any loud music on and even does not talk very loudly for fear that her fetus will be harmed.What would you tell her?

How many nucleotide pairs comprise the human genome?

Which of the two sex chromosomes is significantly smaller and contains approximately 30% less genetic material?

S.J.is most likely to have DZ twins if

What is another name for the German measles?

Rosa is in her first trimester and her mother continually encourages her to eat more reminding her that she is now eating for two.Based upon the text,is Rosa's mother giving her sound advice?

Chromosomes are composed of complex molecules known as ____.

Sam would be LEAST LIKELY to be infertile if

The difference between an individual's genotype and its expression in his or her phenotype is a consequence of the person's ____.

When the blastocyst becomes firmly embedded into the lining of the uterus,what has happened?

By the end of the fourth week the embryo's head is apparent and the eyes,nose,mouth,and ears begin to form.How long is the embryo at this point?

The chromosomes that determine if a fetus will be male or female are known as the _____.

Why has there has been little change in the average height in Western countries over the last few decades?

It is a misconception that females are primarily responsible for infertility,because ____% of the time it is the male who is the source of a couple's infertility.

Genes establish a potential of expression and environment determines where a person's phenotype will fall.What is this boundary of genetic influence?

Explain the phenomenon of incomplete dominance in sickle cell inheritance.

____ is known as the normal process of cell reproduction in which chromosomes duplicate themselves and the cells divide to become two cells.

What is a reaction range? Provide an example to illustrate.

What is the process of regular cell division called?

Adult individuals with trisomy-21 are _____.