Bio Ch 14

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1/11 Questions

When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessivephenotype?
- 0%
- 25%
- 50%
- 75%
- 100%

2.

Huntington's disease is a dominant condition with late age of onset in humans. If one parent has the disease, what is the probability that his or her child will have the disease?
- 1
- 3/4
- 1/2
- 1/4
- 0
Correct Answer

A. 1/2
3.

Which describes the ability of a single gene to have multiple phenotypic effects?
- Incomplete dominance
- Multiple alleles
- Pleiotropy
- Epistasis
Correct Answer

A. Pleiotropy
4.

Cystic fibrosis affects the lungs, pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?
- Incomplete dominance
- Multiple alleles
- Pleitropy
- Epistasis
Correct Answer

A. Pleitropy
5.

Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?
- Prophase I of meiosis
- Prophase II of meiosis
- Metaphase I of meiosis
- Anaphase I of meiosis
- Anaphase of mitosis
Correct Answer

A. Anaphase I of meiosis
6.

Two characters that appear in 9:3:3:1 ratio in the F2 generation should have which of the following properties?
- Each of the traits is controlled by single genes.
- The genes controlling the characters obey the law of independent assortment.
- Each of the genes controlling the characters has two alleles.
- Four genes are involved.
- Sixteen different phenotypes are possible.
Correct Answer

A. The genes controlling the characters obey the law of independent assortment.
7.

A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of:
- Complete dominance.
- Multiple alleles.
- Incomplete dominance
- Polygenic inheritance
- Pleitropy
Correct Answer

A. Incomplete dominance
8.

Mendel's second law of independent assortment has its basis in which of the following events of meiosis I?
- Synapsis of homologous chromosomes
- Crossing over
- Alignment of tetrads at the equator
- Separation of homologs at anaphase
- Separation of cells at telophase
Correct Answer

A. Alignment of tetrads at the equator
9.

The flower color trait in radishes is an example of which of the following?
- A multiple allelic system
- Sex linkage
- Codominance
- Incomplete dominance
- Epistasis
Correct Answer

A. Incomplete dominance
10.

Labrador retrievers are black, brown, or yellow. In a cross of a black female with a brown male, results can be either all black puppies, 1/2 black to 1/2 brown puppies, or 3/4 black to 1/4 yellow puppies. These results indicate which of the following?
- Brown is dominant to black.
- Black is dominant to brown and yellow.
- Yellow is dominant to black.
- There is incomplete dominance.
- Epistasis is involved.
Correct Answer

A. Epistasis is involved.
11.

The relationship between genes S and N is an example of
- Incomplete dominance
- Epistasis
- Complete dominance
- Pleitropy
- Codominance
Correct Answer

A. Epistasis

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Jan 21, 2013

Quiz Edited by
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Nov 28, 2010

Quiz Created by
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Bio Ch 14

When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessivephenotype?

Quiz Preview

Huntington's disease is a dominant condition with late age of onset in humans. If one parent has the disease, what is the probability that his or her child will have the disease?

Which describes the ability of a single gene to have multiple phenotypic effects?

Cystic fibrosis affects the lungs, pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?

Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?

Two characters that appear in 9:3:3:1 ratio in the F2 generation should have which of the following properties?

A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of:

Mendel's second law of independent assortment has its basis in which of the following events of meiosis I?

The flower color trait in radishes is an example of which of the following?

Labrador retrievers are black, brown, or yellow. In a cross of a black female with a brown male, results can be either all black puppies, 1/2 black to 1/2 brown puppies, or 3/4 black to 1/4 yellow puppies. These results indicate which of the following?

The relationship between genes S and N is an example of