Question

Cystic fibrosis is an autosomal recessive disorder. Beth and Tom do not have cystic fibrosis but each have a sibling with cystic fibrosis. Beth's parents and Tom's mother do not have the disease., but Tom's father does. Calculate the probability that if this couple has a child, the child will NOT have cystic fibrosis.

Answer #1

Two
normal parents have a child with cystic fibrosis. Would this be an
autosomal dominant or autosomal recessive disorder? What is the
chance that their next child will have cyatic fibrosis?

Cystic fibrosis is one of the most common autosomal recessive
disorders. The carrier frequency in a general population is 1/25. A
woman who knows she is heterozygous for the mutation that causes
cystic fibrosis (CF) marries a man with no family history of CF at
all. What is the probability that they will produce a child that
has cystic fibrosis? Suppose the couple above has a child with
cystic fibrosis. What is the chance that their second child will
have...

Cystic fibrosis is one of the most common autosomal recessive
disorders. The carrier frequency in a general population is 1/25. A
woman who knows she is heterozygous for the mutation that causes
cystic fibrosis (CF) marries a man with no family history of CF at
all. What is the probability that they will produce a child that
has cystic fibrosis?
Suppose the couple above has a child with cystic fibrosis. What
is the chance that their second child will have...

The Autosomal Recessive disease, Cystic Fibrosis (CF),
runs in Jill’s family. Jill is unaffected. Based on this data,
select which of the following statements could be True?
A.
If Jill’s Paternal Aunt is affected and her Paternal
Grandparents are unaffected. There is a 2/3 probability her father
is a Carrier
B.
In the future, Jill’s parents have another child and
that child has CF. Therefore, her parents have a 100% probability
of being Carriers
C.
Jill could never produce a...

The Autosomal Recessive disease, Cystic Fibrosis (CF), runs in
Jill’s family. Jill is unaffected. Based on this data, select which
of the following statements could be True?
A.
If Jill’s Paternal Aunt is affected and her Paternal
Grandparents are unaffected. There is a 2/3 probability her father
is a Carrier
B.
In the future, Jill’s parents have another child and that child
has CF. Therefore, her parents have a 100% probability of being
Carriers
C.
Jill could never produce a...

A man (Albert) and a woman (Beth) do not have cystic fibrosis
and they have a daughter (Celia) with cystic fibrosis and a son
(David) who does not have cystic fibrosis. The daughter grows up
and she mates with a male (Evan) who does not have cystic fibrosis.
Their only child is a boy (Frank) and he has cystic fibrosis. (You
do not need to include a pedigree of this situation but I strongly
recommend you draw one for your...

Attached earlobe and cystic fibrosis are both autosomal
recessive traits. A woman with attached earlobes, that is a carrier
of cystic fibrosis, marries a man that is genotypically normal for
cystic fibrosis and is a carrier of the attached earlobe trait.
What is the probability that they will have a child with
non-attached earlobes that is a carrier of cystic fibrosis?
A- 1/4
B-1/16
C-1/2
D-3/4

A phenotypically normal couple has had one normal child and a
child with cystic fibrosis, an autosomal recessive
disease. The incidence of cystic fibrosis in the
population from which this couple came is 1/500. If
their normal child eventually marries a phenotypically normal
person from the same population, what is the risk that the
newlyweds will produce a child with cystic fibrosis?

Cystic fibrosis (CF) is caused by a recessive allele. A couple
who do not have CF have a child that has CF. What is the
probability that if they have another child, that the child will be
heterozygous for CF?
1/2 or 50%
1/4 or 25%
3/4 or 75%
0%

Question 5
Cystic fibrosis (CF) is a recessive gene disease meaning that a
child has to inherit a defective CF gene from each parent. This
means that there is a 25% chance of a child having cystic fibrosis
if both parents are CF carriers Hence the number of children with
CF (in a family whose parents are CF carriers) has a binomial
distribution with n = the number of children in the family and p=
0.25
i. In a family...

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