2. Achondroplasia is a short-limbed dwarfism that is inherited as an autosomal dominant disease. The mutant...
2. Achondroplasia is a short-limbed dwarfism that is inherited
as an autosomal dominant disease. The mutant allele that causes
this form of dwarfism (D) is dominant to the normal allele at this
location (d). Individuals who inherit 2 alleles for dwarfism (DD)
typically have a very severe form of achondroplasia that causes
extreme shortening of the bones and an underdeveloped rib cage.
These individuals are usually miscarried or stillborn. Tom and
Vonna both have achondroplasia (but each of them has 1
average-sized parent). Tom and Vonna have 3 children, 2 of whom
have achondroplasia. Tom and Vonna also had 2 stillborn
children.
a. What are the likely genotypes of Tom and Vonna with respect to
the achondroplasia locus?
b. If Vonna becomes pregnant with another child, what is the
probability that this child will be of normal stature (NOT have
achondroplasia)?
c. Consider the 2 children who were stillborn. What do you think
the genotypes of these children could be with respect to
achondroplasia? Why?
Homework Answers
2- a) Genotypes of Tom and Vonna will be D||d
b) probability of having normal offspring will be 1/3 because, offspring with D||D will be stillborn (die). So, they are not counted.
c) genotype of stillborn was D||D
The explanation is given below:
Add Answer to:
2. Achondroplasia is a short-limbed dwarfism that is inherited
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options from left to right first line is a a secound line options from left to...
options from left to right
first line is
a a
secound line options from left to right
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third line options from left to right
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6
A human trait that is caused by an autosomal dominant mutant allele has a penetrance of 50%. A man who is heterozygous for this mutant allele marries a woman who is homozygous recessive for the normal allele. If they have two children then what is the probability that both children will show the normal phenotype? O 1/4 o 1/2 03/16 0 7/8 09/16
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What is the mode of inheritance for hypercholesterolemia?
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b.
Autosomal recessive
c.
X-linked dominant
d.
X-linked recessive
e.
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What is the mode of inheritance for Hunter's syndrome?
a.
Autosomal dominant
b.
Autosomal recessive
c.
X-linked dominant
d.
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More than one of the above are possible.
------------------------------------------------------------
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Question 25 1 pts Achondroplasia shows autosomal dominant inheritance with complete penetrance. A man with achondroplasia has an unaffected partner of normal height. Their first two children are not affected. Which of the following is correct? O The mother of these children has a sister with achondroplasia. This increases the risk that the children could be carriers. O The probability that their next child will be affected is 1 in 2 If their third child is unaffected, the probability that...
options from left to right
first line is
a a
secound line options from left to right
Aa aa AA Aa aa
third line options from left to right
AA. aa Aa AA aa
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6
A human trait that is caused by an autosomal dominant mutant allele has a penetrance of 50%. A man who is heterozygous for this mutant allele marries a woman who is homozygous recessive for the normal allele. If they have two children then what is the probability that both children will show the normal phenotype? O 1/4 o 1/2 03/16 0 7/8 09/16
1. Nystagmus, a condition causing oscillations in eye movement, is inherited with the dominant allele N on the X chromosome. The X-linked recessive allele n does not cause Nystagmus. An immunodeficiency disorder called Chronic Granulomatous Disease (CGD) is inherited with the autosomal recessive allele g. Individuals with the autosomal dominant allele G do not have Chronic Granulomatous Disease. a. Tiffany has both Nystagmus and CGD. Her husband Todd has neither condition. Tiffany's father does not have Nystagmus. Todd's mother has...
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What is the mode of inheritance for hypercholesterolemia?
a.
Autosomal dominant
b.
Autosomal recessive
c.
X-linked dominant
d.
X-linked recessive
e.
More than one of the above are possible
----------------------------------------------------------------
What is the mode of inheritance for Hunter's syndrome?
a.
Autosomal dominant
b.
Autosomal recessive
c.
X-linked dominant
d.
X-linked recessive
e.
More than one of the above are possible.
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hypercholesterolemia locus (dominant allele is denoted by H,
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