Question 1

Describe a situation where two aneuploid gametes would yield a eupoid zygote.

Accepted Answer

The aneuploidy of the gametes must be such that the same chromosomes are affected in each, one with an extra copy of the chromosome and the only deficient in that same chromosome. Fusion of these two gametes would restore euploidy.

Question 2

A person with an XO genotype for the sex chromosomes would be phenotypically

Accepted Answer

A)  intersex (both male and female). 
B)  male or female with equal probability. 
C)  neither male nor female. 
D)  female. 
E)  male. 
A)  intersex (both male and female). 
B)  male or female with equal probability. 
C)  neither male nor female. 
D)  female. 
E)  male. D

Question 3

A litter produced by a calico cat is not expected to include

Accepted Answer

A)  solid-colored female kittens. 
B)  calico male kittens. 
C)  calico female kittens. 
D)  solid-colored male kittens. 
E)  All of the above are possible. 
A)  solid-colored female kittens. 
B)  calico male kittens. 
C)  calico female kittens. 
D)  solid-colored male kittens. 
E)  All of the above are possible. B

Question 4

Half a woman's somatic cells express her paternal X chromosome, and half express her maternal X chromosome.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following has heterogametic females?

Accepted Answer

A)  house mice 
B)  monarch butterflies 
C)  crows 
D)  A, B, and C 
E)  B and C only 
A)  house mice 
B)  monarch butterflies 
C)  crows 
D)  A, B, and C 
E)  B and C only

Question 6

Nondisjunction can lead to two forms of aneuploidy. What are they, and how do they occur?

Accepted Answer

The two most common aneuploid conditions

Question 7

Which of the following is an example of a genetic mosaic?

Accepted Answer

A)  Calico coat color in cats 
B)  Albinism in mice 
C)  Red-green color blindness in humans 
D)  Male pattern baldness in humans 
E)  A, B, and C only 
A)  Calico coat color in cats 
B)  Albinism in mice 
C)  Red-green color blindness in humans 
D)  Male pattern baldness in humans 
E)  A, B, and C only

Question 8

Gametes and spores are both haploid cells. Gametes form by ________ and spores form by ________.

Accepted Answer

A)  meiosis, meiosis 
B)  mitosis, meiosis 
C)  meiosis, mitosis 
D)  A and B 
E)  A, B, and C 
A)  meiosis, meiosis 
B)  mitosis, meiosis 
C)  meiosis, mitosis 
D)  A and B 
E)  A, B, and C

Question 9

Turner syndrome individuals are

Accepted Answer

A)  polyploidy. 
B)  aneuploid 
C)  haploid. 
D)  euploid. 
E)  none of the above. 
A)  polyploidy. 
B)  aneuploid 
C)  haploid. 
D)  euploid. 
E)  none of the above.

Question 10

Y-linked traits are termed holandric.

Accepted Answer

A) True 
 B)False

Question 11

The chromosome theory of inheritance sought to explain Mendelian patterns in terms of chromosome movement. Can you think of an experimental approach to test for the Mendelian principle of segregation using chromosomes?

Accepted Answer

If replicating chromosomes could be chem

Question 12

The largest autosome is chromosome ________ and the smallest is chromosome ________.

Accepted Answer

A)  1, 21 
B)  1, 22 
C)  1, Y 
D)  X, 22 
E)  none of the above 
A)  1, 21 
B)  1, 22 
C)  1, Y 
D)  X, 22 
E)  none of the above

Question 13

You are a breeder of animals with an X-linked coat-color gene, one allele of which gives black fur and another of which gives white fur. If you cross a black-colored female with a white-colored male, what would their male and female offspring look like?

Accepted Answer

Their male offspring would be

Question 14

The chromosome theory of inheritance states that

Accepted Answer

A)  chromosomes consist of DNA. 
B)  genes are located on chromosomes. 
C)  different chromosomes assort independently of one another. 
D)  chromosomes replicate before cell division. 
E)  alleles of a gene segregate during cell division. 
A)  chromosomes consist of DNA. 
B)  genes are located on chromosomes. 
C)  different chromosomes assort independently of one another. 
D)  chromosomes replicate before cell division. 
E)  alleles of a gene segregate during cell division.

Question 15

A male who undergoes a sex-change operation will be chromosomally

Accepted Answer

A)  YYY. 
B)  XY. 
C)  XYY. 
D)  XX. 
E)  XXY. 
A)  YYY. 
B)  XY. 
C)  XYY. 
D)  XX. 
E)  XXY.

Question 16

In human males, genes on the X chromosome are

Accepted Answer

A)  homozygous. 
B)  hemizygous. 
C)  heterogametic. 
D)  heterozygous. 
E)  homogametic. 
A)  homozygous. 
B)  hemizygous. 
C)  heterogametic. 
D)  heterozygous. 
E)  homogametic.

Question 17

Barr bodies are inactivated X chromosomes.

Accepted Answer

A) True 
 B)False

Question 18

A woman who is color blind, a sex-linked trait, has several children with a man who has normal vision. What are the possible phenotypes of their children with respect to this trait?

Accepted Answer

All their daughters

Question 19

Nondisjunction leads to polyploidy.

Accepted Answer

A) True 
 B)False

Question 20

How do you think chromosomes got their name?

Accepted Answer

The term, literally meaning "c

Exam 3: Advanced Gene Mapping in Eukaryotes

Describe a situation where two aneuploid gametes would yield a eupoid zygote.

A person with an XO genotype for the sex chromosomes would be phenotypically

A litter produced by a calico cat is not expected to include

Half a woman's somatic cells express her paternal X chromosome, and half express her maternal X chromosome.

Which of the following has heterogametic females?

Nondisjunction can lead to two forms of aneuploidy. What are they, and how do they occur?

Which of the following is an example of a genetic mosaic?

Gametes and spores are both haploid cells. Gametes form by ________ and spores form by ________.

Turner syndrome individuals are

Y-linked traits are termed holandric.

The chromosome theory of inheritance sought to explain Mendelian patterns in terms of chromosome movement. Can you think of an experimental approach to test for the Mendelian principle of segregation using chromosomes?

The largest autosome is chromosome ________ and the smallest is chromosome ________.

You are a breeder of animals with an X-linked coat-color gene, one allele of which gives black fur and another of which gives white fur. If you cross a black-colored female with a white-colored male, what would their male and female offspring look like?

The chromosome theory of inheritance states that

A male who undergoes a sex-change operation will be chromosomally

In human males, genes on the X chromosome are

Barr bodies are inactivated X chromosomes.

A woman who is color blind, a sex-linked trait, has several children with a man who has normal vision. What are the possible phenotypes of their children with respect to this trait?

Nondisjunction leads to polyploidy.

How do you think chromosomes got their name?

Genetics of Bacteria and Bacteriophages

Variations in Chromosome Structure and Number

Gene Mapping in Eukaryotes

Quantitative Genetics

Extensions of Mendelian Genetic Principles

Chromosomal Basis of Inheritance

Molecular Evolution

Population Genetics

Non-Mendelian Inheritance

Genetics of Cancer

Genetic Analysis of Development

Regulation of Gene Expression in Eukaryotes

Mendelian Genetics

Regulation of Gene Expression in Bacteria and Bacteriophages

Genomics

Applications of Recombinant DNA Technology

Recombinant DNA Technology

DNA Mutation, DNA Repair, and Transposable Elements

Gene Expression: Translation

Gene Expression: Transcription

Gene Control of Proteins

DNA Replication

DNA: The Genetic Material

Genetics: an Introduction

Filters

Gametes and spores are both haploid cells. Gametes form by and spores form by .

The largest autosome is chromosome and the smallest is chromosome .