Part 4 Genetics Test Question Preview (ID: 31593)


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29 . In the pedigree on your study guide, is the trait autosomal or sex-linked? Why?
a) sex-linked because only males are effected
b) autosomal because both males and females are effected
c) sex-linked because both males and females are effected
d) autosomal because only males are effected

30. In the pedigree on your study guide, is the trait dominant or recessive? How do you know?
a) recessive because it does not show up in every generation
b) dominant because it does show up in every generation
c) dominant because it does not show up in every generation
d) recessive because it does show up in every generation

31. True or False: The X and Y chromosome are known as sex chromosomes because they determine an individuals sex
a) True
b) False
c)
d)

31. True or False: Males have two X chromosomes
a) True
b) False
c)
d)

31. True or False: All the chromosomes except the sex chromosome are autosomes.
a) True
b) False
c)
d)

31. True or False: Biologists would write 46 XY to indicate a human female
a) True
b) False
c)
d)

If brown is the dominant color in rabbits, what are the genotypes of homozygous brown and heterzygous brown rabbits?
a) homozygous brown: BB; heterozygous brown: Bb
b) homozygous brown: bb; heterozygous brown: Bb
c) homozygous: Bb; heterozygous: BB
d) homozygous: Bb; heterozygous: bb

35. Why is Lamb A considered to be a clone of Sheep A?
a) Lamb A is not a clone; cloning has never happened
b) Lamb A is the offspring of Sheep A and Sheep B
c) Lamb A contains DNA that is completely different than Sheep S
d) Lamb A contains identical DNA to Sheep A

24. b. A homozygous dominant and homozygous parents are crossed to create offspring. What are the possible genotypes?
a) 100% TT, 0% Tt, 0% tt
b) 0% TT; 100% Tt; 0% tt
c) 50% TT; 0% Tt; 50% tt
d) 50% TT; 25% Tt; 525% tt

34. b. A homozygous dominant and homozygous parents are crossed to create offspring. What are the possible phenotypes?
a) 75% tall; 25%short
b) 0% tall; 100% short
c) 50% tall; 50% short
d) 100% tall; 0% short

32. A circle on a pedigree represents ....?
a) a female
b) a male
c) a recessive trait
d) a dominant trait

32. A square on a pedigree represents ....?
a) a male
b) a female
c) a recessive trait
d) a dominant trait

32. A completely filled in shape on a pedigree represents....
a) a carrier of a trait
b) a person who does not express the trait
c) a person who expresses the trait
d) a female

34. a. A purebred tall is crossed with a hybrid. What are the possible genotypes?
a) 0% TT; 0% Tt; 100% tt
b) 50% TT; 0% Tt; 50% tt
c) 50% TT; 50% Tt; 0% tt
d) 75% TT; 25% Tt; 50% tt

32. A half filled in shape on a pedigree represents a...
a) a male
b) a carrier of the trait
c) a person who expresses the trait
d) a person who does not express the trait

34. a. A purebred tall is crossed with a hybrid. What are the possible phenotypes?
a) 100% Tall; 0% short
b) 0% Tall; 100% short
c) 75% Tall; 25% short
d) 50% Tall; 50% short

34. c. A heterozyous is crossed with a homozygous recessive. What are the possible phenotypes?
a) 75% Tall; 25% short
b) 50% Tall; 50% short
c) 0% Tall; 100% short
d) 100% Tall; 0% short

34. c. A heterozyous is crossed with a homozygous recessive. What are the possible genotypes?
a) 50% TT; 0% Tt; 50% tt
b) 50% TT; 25% Tt; 25% tt
c) 0% TT; 0% Tt; 100% tt
d) 0% TT; 50% Tt; 50% tt

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