Last quiz to finish this class for good question 1
the phenotype produced from a pair of alleles rr is determined by the
select one:
dominant allele
father's allele
mother's allele

recessive allele question 2
huntington's disease is a genetic disorder that causes the breakdown of brain tissue starting during middle age. huntington's is inherited by anyone carrying a dominant allele. which of the following genotypes is least likely to have huntington's disease?
question 3
the two copies of a gene inherited from each parent in animal cells are called
select one:
alleles
recessives
chromatin
traits
select one: question 4
in pea plants the allele for tall is dominant to the allele for short. what would be the phenotype of the parents of this cross? question 5
the ability to roll the tongue in humans is coded by the dominant allele r. the inability to roll the tongue is coded by the recessive allele r. a man with an rr allele combination for the trait produces a zygote with a woman with an rr allele combination for the trait. which allele combination could occur in the zygote?
select one:

rr

rr

rr

r

select one:
short
tall
medium
one parent tall, one parent short
hh
hh
hh
hh question 6
tay–sachs disease is caused by a recessive lethal allele, meaning that individuals that are homozygous recessive (tt) will have the disease and die before they are able to have offspring. two parents that are heterozygous (tt) carriers for tay–sachs want to have children. what are the chances that their children will get tay-sachs disease?

select one: question 8
hemophilia is a recessive, x-linked genetic disorder. if a male child is born with hemophilia and neither the mother nor the father has hemophilia, which of the following statements is most likely true?
select one:
the mother is the carrier.
all answers are correct.
the child's sister will have hemophilia.
the father is the carrier.

25% question 9
hemophilia is an x–linked recessive disorder. if you cross a normal male with a hemophiliac female, what will be the probability of having hemophiliac children?

select one:

75%

25%

100%

0%

50%

50%
question 10
can a male be a carrier for a sex-linked disease?

select one:

no, males have only a single copy of sex-linked genes

there is no way to predict.

yes, if the male's father and mother were carriers

yes, if the trait is recessive

100%

75% cystic fibrosis is a genetic disease that affects mucus cells in the lungs. the disease affects only those individuals that have a homozygous recessive genotype (ff). two individuals that are heterozygous carriers for the disease decide to have children. what are the chances that one of their children will have cystic fibrosis?

select one:

100%

25%

75%

50%