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Exam 2: Biological Beginnings

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Question 41

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During _____,a cell of the testes in men or ovaries in women duplicates its chromosomes and then divides twice,thus forming four cells,each of which has only half the genetic material of the parent cell.

A) meiosis
B) mitosis
C) osmosis
D) fertilization

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Question 42

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Which of the following women has the highest probability of giving birth to a child with Down syndrome?

A) Sarah,a 21-year-old Asian woman.
B) Jane,a 41-year-old Euro-American woman.
C) Ella,a 27-year-old African American woman.
D) Destiny,a 38-year-old African American woman.

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Question 43

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What are gametes?

Rachel loves to read books,and she also encourages her daughter to read by regularly taking her to the local library and buying her lots of books.Rachel's daughter is now an avid reader.This reflects a(n) _____ correlation.

Phenylketonuria (PKU) is a genetic disorder in which the individual cannot properly metabolize phenylalanine,which is a(n) _____.

_____ mainly focuses on the isolation and examination of fetal cells circulating in the mother's blood and analysis of cell-free fetal DNA in maternal plasma.

Mary and Jim are expecting a child and prenatal diagnostic procedures have confirmed that the fetus has _____,a neural tube disorder that causes brain and spine abnormalities.Their physician has explained that this gene-linked abnormality could be treated with corrective surgery at birth,orthopedic devices,and physical or medical therapy.

Klinefelter syndrome occurs approximately _____ live male births.

Amniocentesis brings a small risk of:

Shakena is a 38-year-old single woman who works as a pharmaceutical representative.She would like to adopt a child.Recent changes in adoption requirements would mean that:

Jerome and Tyrone are fraternal twins.This means that they developed from:

As the benefits of evolutionary selection decrease with age,Baltes argues,the need for all of the following increases,EXCEPT:

Timothy is a quiet 6-year-old who is usually withdrawn in class.As a result,he does not receive much attention from his peers and mostly plays by himself.According to Sandra Scarr,this is an example of a(n) _____.

A genotype is _____ percent of a person's genetic material.

A recessive gene exerts its influence only if:

Marly describes her friend Gina as having blonde hair,green eyes,and fair skin with freckles.Marly has described Gina's _____.

A cell which contains 46 chromosomes arranged in 23 pairs undergoes the process of _____ to produce two new cells,each containing the same DNA as the original cell,arranged in the same 23 pairs of chromosomes.

Which of the following is a gene-linked abnormality?

_____ is the field that seeks to discover the influence of heredity and environment on individual differences in human traits and development.

Parents often interact differently with each sibling,and siblings interact differently with parents.Even these experiences occurring within the family can be part of the _____ of siblings.