Chapter 7. 7·9–7·15 How are genotypes translated into phenotypes?

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 7·9–7·15 How are genotypes translated into phenotypes? by answering the following questions.

1.

1. The ABO blood type system in humans is an example of:

A.
B.
C.
D.
E.

Correct. (See section 7·10 What’s your blood type? Some genes have more than two alleles.)
Incorrect. (See section 7·10 What’s your blood type? Some genes have more than two alleles.)

2.

2. The figure above provides an example of:

A.
B.
C.
D.
E.

Correct! (See section 7·9 Incomplete dominance and codominance: the effects of both alleles in a genotype can show up in the phenotype.)
Incorrect. (See section 7·9 Incomplete dominance and codominance: the effects of both alleles in a genotype can show up in the phenotype.)

3.

3. Recent research has identified two genes that help determine height in humans. Individuals with the "tall" allele for both genes are taller than those with the tall allele for only one. Individuals with one tall allele, in turn, are taller than people who do not have the tall allele for either gene. This is known as:

A.
B.
C.
D.
E.

Correct. (See section 7·11 Multigene traits: how are continuously varying traits such as height influenced by genes?)
Incorrect. (See section 7·11 Multigene traits: how are continuously varying traits such as height influenced by genes?)

4.

4. If a male with color blindness (sex-related variety) and a female with normal vision have a color-blind son, what can you infer about the parents?

A.
B.
C.
D.
E.

Correct. (See section 7·13 Why are more men than women color-blind? Sex-linked traits differ in their patterns of expression in males and females.)
Incorrect. (See section 7·13 Why are more men than women color-blind? Sex-linked traits differ in their patterns of expression in males and females.)

5.

5. The same genetic condition that causes sickle-cell anemia can also protect against:

A.
B.
C.
D.
E.

Correct. (See section 7·12 Sometimes one gene influences multiple traits.)
Incorrect. (See section 7·12 Sometimes one gene influences multiple traits.)

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