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Exam 19: Genetics and Inheritance

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Question 31

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Match each of the following disorders to the genotype with which it is associated. -trisomy 18

A) Tay-Sachs
B) Turner syndrome
C) Edwards syndrome
D) Klinefelter syndrome
E) Down syndrome

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Question 32

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An example of a genotype is

A) attached earlobes.
B) homozygous dominant.
C) brown hair color.
D) long fingers.
E) blood type AB.

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Question 33

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Based on the information below, answer the following question(s) , assuming complete dominance. "In humans, a widow's peak is a dominant trait, and a straight hairline is a recessive trait." -Cystic fibrosis is a genetic disorder that results from the inheritance of two recessive alleles. What is the chance that a child will inherit the disorder if one parent is heterozygous for this gene and one parent has cystic fibrosis?

Explain why in some cases, linked genes may be separated during crossing-over, yet at other times, linked genes are not affected by the recombination during meiosis.

The trend toward increased height and weight due to improved nutrition in certain human populations is an example of the effect of ________ on phenotypes.

If a piece of chromosome breaks off during mitosis or meiosis and does not reattach, the event is called

Genes located on the same chromosome are not always inherited together because of the process of ________, which occurs during meiosis; this process "reshuffles" the genes.

Alternative versions of the same gene are ________.

Identify the mode of inheritance for each of the following traits. -AB blood type

Which of the following human traits is an example of codominance?

Mendel's law of independent assortment states that genes separate from each other during gamete formation so that each sperm or egg gets only one unit of each pair.

A Punnett square can be used to determine possible phenotypic ratios of offspring given a particular combination of parental alleles.

Match each of the following disorders to the genotype with which it is associated. -one X chromosome; no Y or additional X chromosome

Identify the mode of inheritance for each of the following traits. -baldness

Failure of sister chromatids to separate properly is called

Which one of the following syndromes results in an individual with a nearly normal female phenotype and a tendency to develop mild mental retardation?

The Punnett square is a useful tool for

Identify the mode of inheritance for each of the following traits. -Down syndrome

The process by which a piece of a chromosome breaks off and then attaches to another chromosome is referred to as ________.

Cystic fibrosis is the most common fatal genetic disease in North America and results in what type of allele located on chromosome 7?