1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lilavasa [31]
3 years ago
15

Alkaptonuria is an infrequent autosomal recessive condition. It is first noticed in newborns when the urine in their diapers tur

ns black upon exposure to air. The condition is caused by the defective transport of the amino acid phenylalanine through the intestinal walls during digestion. About 4 people per 1000 are carriers of alkaptonuria. Sara and James had never heard of alkaptonuria and were shocked to discover that their first child had the condition. Sara's sister Mary and her husband Frank are planning to have a family and are concerned about the possibility of alkaptonuria in one of their children.
The four adults (Sara, James, Mary, and Frank) seek information from a neighbor who is a retired physician.After discussing their family histories, the neighbor says, " I never took genetics, but I know from my many years in practice that Sara and James are both carriers of this recessive condition. Since their first child had the condition, there is a very low chance that the next child will also have it, because the odds of having two children with a recessive condition are very low. Mary and Frank have no chance of having a child with alkaptonuria because Frank has no family history of the condition."The two couples each have babies and both babies have alkaptonuria.

Required:
a. What is the probability that the second child of Mary and Frank will have alkaptonuria?
b. What is the chance that the third child of Sara and James will be free of the condition?
c.The couples are worried that one of their grandchildren will inherit alkaptonuria.
d. What is the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history?
e.The couples are worried that one of their grandchildren will inherit alkaptonuria.
f. What is the chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history?
Biology
1 answer:
Arisa [49]3 years ago
5 0

Answer:

See the answer below

Explanation:

Let the disorder be represented by the allele a.

Since the disease is an autosomal recessive one, affected individuals will have the genotype aa and normal individuals will have the genotype Aa or AA.

Since the four adults are carriers, their genotypes would be Aa.

                    Aa     x     Aa

Progeny:    AA    2Aa    aa

Probability of being affected = 1/4

Probability of being a carrier = 1/2

Probability of not being affected = 3/4

(a) The chance that the child second child of Mary and Frank will have alkaptonuria = 1/2

(b) The chance that  the third child of Sara and James will be free of the condition = 3/4

(c)

(d) If someone has no family history of the disorder, their genotype would be AA.

                 AA     x     aa

                        4 Aa

<em>The chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history </em>= 0

(e)

(f) <em>The chance that a child with alkaptonuria will have an offspring with alkaptonuria if the child's mate has no family history</em> = 0

You might be interested in
Sometimes when a bee pollinates a flower, this action is beneficial to humans. Bees are the main pollinators of many plants that
r-ruslan [8.4K]

Answer: Ecosystem Services

Explanation: Simply put,Ecosystem services refer to all the benefits that man enjoys from his relationship with the ecosystem.Ecosystem services are the benefits that people obtain from ecosystems. Ecosystem services are indispensable to the wellbeing of all people, everywhere in the world. They include provision,regulation and cultural services that directly affect people, and supporting services needed to maintain the other services. From the availability of adequate food and water, to disease regulation of vectors, pests, and pathogens, human health and well-being depends on these services and conditions from the natural environment.

We depend on nature for our survival – without healthy ecosystems, our drinking water isn’t clean nor is the air we breathe. Studies also show that people who spend time in nature tend to be happier than those that don’t. Being outdoor can even act as a natural anti-depressant. With industry and urban sprawl expanding at unprecedented rates, Ecosystem Services attempt to translate the benefits we receive from nature into economic terms so we can better understand the compromise we are making between nature and industrial development.

3 0
3 years ago
You are visiting Florida. You observe that many of the baby alligators have more than one tail. After doing research, you learn
almond37 [142]

Answer:

Bacteria that entered an organism body can cause mutations by altering the gene

6 0
3 years ago
Plant cells have an additional structure beyond their plasma cell membranes that animal cells lack. One function of this additio
Genrish500 [490]

Answer:

chloroplast

Explanation:

it helps aid in the process of photosynthesis and the chlorophyll inside helps to pigment the plant and make it green

3 0
3 years ago
Is it true that all cells have the same genes, but different genes are active in different cells?
Sav [38]

Answer:

Is it true that all cells have the same genes, but different genes are active in different cells.

No, all cells are made up of a gene which is inherited from the parents cell. The gene is located in the DNA which is found in the nucleus of every living cell

Explanation:

7 0
3 years ago
Can someone help me with this
n200080 [17]
Process and use energy.
6 0
3 years ago
Other questions:
  • Help! will mark if answered asap and correctly
    11·1 answer
  • Cells such as neurons, which rarely if ever divide, can be explained as
    15·1 answer
  • Classify the natural resources as renewable or nonrenewable. 1) Water 2)Oil 3)Natural Gas 4)Uranium 5) Wood 6)Coal 7)Sunlight 8)
    6·1 answer
  • What is the result of dissociation of water? a) Formation of O-2 ions b) Formation of H+ and OH- ions c) Formation of H- and OH+
    8·1 answer
  • Complex organisms produce sec cells that unite during fertilization forming a single cell known as?
    10·1 answer
  • In a DNA molecule, T pairs with _______.<br> a. A<br> b. C<br> c. G
    15·2 answers
  • What are the four stages of complete metamorphosis?
    11·1 answer
  • A student observed how many times bees visited each of four different colored roses. What would be the BEST way to visually comm
    12·1 answer
  • Someone help me pleaseeee
    10·1 answer
  • Answer it please ty!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!