Question 1

If there is complete linkage with genes Ss (for smooth or wrinkled seeds) and Gg (for green or yellow seeds) ,what phenotypes would you expect in the offspring of a cross with one heterozygous parent (Ss,Gg) ,which would all produce all smooth and green seeds,and a homozygous recessive parent (ss,gg) ,which would produce all wrinkled yellow seeds?

Accepted Answer

A)  smooth green seeds or wrinkled yellow seeds only
B)  smooth green seeds only
C)  smooth green seeds,wrinkled yellow seeds,smooth yellow seeds,and wrinkled green seeds
D)  wrinkled yellow seeds onlyE) B) and D)
F) A) and D)

Question 2

Describe a genetic disorder associated with a deletion in chromosomal number.

Accepted Answer

Williams syndrome occurs when chromosome...

Question 3

What determines whether or not genes located on the same chromosome can assort independently?

Accepted Answer

A)  Genes located on the same chromosome can never assort independently.
B)  Genes located on the same chromosome always assort independently.
C)  Whether or not independent assortment occurs is due to random chance.
D)  The distance between genes located on the same chromosome determines whether or not they can show any level of independent assortment.
E)  The phenotype decides what that the gene will express.F) B) and C)
G) B) and E)

Question 4

The ____ gene causes mental retardation by increasing the levels of purines in the blood.

Accepted Answer

A)  Gart
B)  Dart
C)  RFLP
D)  SRY
E)  BarrF) None of the above
G) B) and C)

Question 5

The trait diagrammed in Figure 24.1 is a(n)

Accepted Answer

A)  dominant X-linked trait.
B)  recessive X-linked trait.
C)  recessive Y-linked trait.
D)  autosomal dominant trait.
E)  dominant Y-linked trait.F) B) and D)
G) B) and E)

Question 6

In fruit flies,bar eye is inherited by an X-linked allele (B for bar) .If a heterozygous bar-eyed female is mated to a non-bar-eyed male,what will be the expected ratio of phenotype given four offspring?

Accepted Answer

A)  two bar-eyed females,two bar-eyed males
B)  one bar-eyed and one non-bar-eyed female,one bar-eyed and one non-bar-eyed male
C)  three bar-eyed females and one non-bar-eyed male
D)  bar-eyed females only
E)  non-bar-eyed males onlyF) None of the above
G) A) and B)

Question 7

A color-blind (recessive trait) woman will pass the allele to

Accepted Answer

A)  her sons only.
B)  all her children.
C)  her daughters only.
D)  none of her children.
E)  her husband.F) A) and D)
G) None of the above

Question 8

If a person has short stature,a fold in the eyelids,fissured tongue,and mental retardation,they have

Accepted Answer

A)  cri du chat syndrome.
B)  Down syndrome.
C)  fragile X syndrome.
D)  Turner syndrome.
E)  Klinefelter syndrome.F) All of the above
G) A) and B)

Question 9

Which of the following would not be the same in a male and female?

Accepted Answer

A)  the total number of autosomes
B)  the loci for the majority of their genes
C)  the types of sex chromosomes
D)  the inheritance of one X chromosome from their mother
E)  the need for two sex chromosomesF) None of the above
G) A) and C)

Question 10

The reason that missing an X chromosome and having an extra X chromosome do NOT cause more harm than they do is best explained by the

Accepted Answer

A)  inactivation of any X beyond the first as a Barr body.
B)  presence of genes on the Y chromosome that determine maleness.
C)  presence of genes on the X chromosomes that determine femaleness.
D)  loss of a sex chromosome in normal cells as embryo development occurs.
E)  a higher level of gene-repair enzyme activity on sex chromosomes.F) All of the above
G) A) and B)

Question 11

Genes on the ___ chromosome determine if the sex of a child will be male or female.

Accepted Answer

A)  X
B)  Y
C)  21st
D)  5th
E)  19thF) B) and E)
G) A) and D)

Question 12

Which of the following is NOT true about a karyotype?

Accepted Answer

A)  Homologous chromosomes are arranged in pairs.
B)  Sex chromosomes are identified separately from autosomes.
C)  All chromosome pairs are numbered differently for males and females.
D)  Chromosome pairs are assorted by both size and shape.
E)  Banding patterns are used in pairing chromosomes.F) C) and D)
G) B) and D)

Question 13

Color-blindness is inherited as an X-linked recessive trait.A male who is color-blind marries a heterozygous woman.What percent of their total children will be color-blind?

Accepted Answer

A)  0%
B)  25%
C)  50%
D)  75%
E)  100%F) A) and C)
G) All of the above

Exam 24: Chromosomal Inheritance and Genetic Disorders

A color-blind (recessive trait) woman will pass the allele to

Correct Answer
verified

The trait diagrammed in Figure 24.1 is a(n)

Correct Answer
verified

Describe a genetic disorder associated with a deletion in chromosomal number.

Correct Answer
verified
Williams syndrome occurs when chromosome...
View Answer

Which of the following is NOT true about a karyotype?

Correct Answer
verified

If a person has short stature,a fold in the eyelids,fissured tongue,and mental retardation,they have

Correct Answer
verified

Which of the following would not be the same in a male and female?

Correct Answer
verified

Correct Answer
verified

The reason that missing an X chromosome and having an extra X chromosome do NOT cause more harm than they do is best explained by the

Correct Answer
verified

Genes on the ___ chromosome determine if the sex of a child will be male or female.

Correct Answer
verified

In fruit flies,bar eye is inherited by an X-linked allele (B for bar) .If a heterozygous bar-eyed female is mated to a non-bar-eyed male,what will be the expected ratio of phenotype given four offspring?

Correct Answer
verified

The ____ gene causes mental retardation by increasing the levels of purines in the blood.

Correct Answer
verified

Color-blindness is inherited as an X-linked recessive trait.A male who is color-blind marries a heterozygous woman.What percent of their total children will be color-blind?

Correct Answer
verified

What determines whether or not genes located on the same chromosome can assort independently?

Correct Answer
verified

Exam 24: Chromosomal Inheritance and Genetic Disorders

A color-blind (recessive trait) woman will pass the allele to

Correct AnswerverifiedShow Answer

The trait diagrammed in Figure 24.1 is a(n)

Correct AnswerverifiedShow Answer

Describe a genetic disorder associated with a deletion in chromosomal number.

Correct AnswerverifiedWilliams syndrome occurs when chromosome...View AnswerShow Answer

Which of the following is NOT true about a karyotype?

Correct AnswerverifiedShow Answer

If a person has short stature,a fold in the eyelids,fissured tongue,and mental retardation,they have

Correct AnswerverifiedShow Answer

Which of the following would not be the same in a male and female?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The reason that missing an X chromosome and having an extra X chromosome do NOT cause more harm than they do is best explained by the

Correct AnswerverifiedShow Answer

Genes on the ___ chromosome determine if the sex of a child will be male or female.

Correct AnswerverifiedShow Answer

In fruit flies,bar eye is inherited by an X-linked allele (B for bar) .If a heterozygous bar-eyed female is mated to a non-bar-eyed male,what will be the expected ratio of phenotype given four offspring?

Correct AnswerverifiedShow Answer

The ____ gene causes mental retardation by increasing the levels of purines in the blood.

Correct AnswerverifiedShow Answer

Color-blindness is inherited as an X-linked recessive trait.A male who is color-blind marries a heterozygous woman.What percent of their total children will be color-blind?

Correct AnswerverifiedShow Answer

What determines whether or not genes located on the same chromosome can assort independently?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified
Williams syndrome occurs when chromosome...
View Answer

Correct Answer
verified

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