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
attashe74 [19]
3 years ago
14

Suppose a couple has come to see you to discuss the probability of their children having cystic fibrosis (CF). CF is known to be

an autosomal recessive disease caused by a single gene mutation that has pleiotropic effects including thick mucus in the lungs and excessively salty sweat. After discussions with the couple, you learn that they both have a history of the disease in their families. Both the man and his wife are phenotypically normal, but both have one parent and one sibling with CF. The other parent in each case is phenotypically normal. Explain to the couple the probability of their children having CF or being carriers for the CF gene. Explain to them why their children can have the disease even though neither of them have the disease. Draw a Punnett square to help illustrate your points.

Biology
1 answer:
m_a_m_a [10]3 years ago
6 0

Answer:

The children that the couple may have a 25% chance of having cystic fibrosis and 75% chance of being carriers for the CF gene

Explanation:

We know that both parents are in the same situation. Let's start for example with the mother. She has one parent and one sibling with cystic fibrosis (CF). So, supposing that the allele of the gene that causes the disease is <em>"f"</em>,  as the disease is autosomal recessive, both, the parent and the sibling have the genotype ff.

Also, knowing that the other parent has a normal phenotype, but the sibling has CF, we deduce that the other parent of the mother must have a <em>Ff</em>.

So, <em>despite the mother's phenotype is normal, her genotype is Ff</em> (see the Punnett square 1) Couple's parents in the attached image). In other words, she is a carrier for the CF gene.

As the parents' situation is analogous, <em>we can deduce that the father also has a genotype Ff  </em>and is also a carrier for the CF gene.

Now, if we look at the Punnett square for them  (see the square 2) Couple in the attached image), we see that all their children will always have at least one copy of the CF allele, <em>f</em>.

More specifically, their children have 25%  chance of having cystic fibrosis and 75% chance of having a normal phenotype but being carriers of the CF gene.

You might be interested in
Baldness (B) is inherited as X-linked dominant disease. An affected male marries a homozygous recessive female. What is the prob
torisob [31]
This can be solved with Punnett squares. The affected male has the X^{B} y genotype, and the female is homozygous recessive. This means that she does not carry this, and therefore, will have the genotype XᵇXᵇ

While doing this Punnett Square, keep in mind that in order to have the male offspring affected, their genotype has to be X^{B} y

Since there are no X^{B} y, the probability of their male offspring inheriting this disease is 0%

5 0
3 years ago
How many co2 produced in 3 glucose​
coldgirl [10]

Answer:

Co2 produced in 3 glucose is 2

4 0
3 years ago
Hola quiero mandar una foto en brainly como hago
Neko [114]
<span>su pregunta no tiene respuesta</span>
8 0
3 years ago
Read 2 more answers
The table shows the energy that is stored in three types of organic molecules. What is the best conclusion based on this data?
Alina [70]

The answer is B hope this helps : )

3 0
2 years ago
What allows people to control the movement of the electric current in a circuit?Battery or Switch
Murrr4er [49]

Answer:

Switch

Explanation:

3 0
2 years ago
Other questions:
  • What tells the cell what to do
    8·2 answers
  • What are fossils? the remains or traces of an organism preserved from the geologic past objects that people of long ago left beh
    10·1 answer
  • Which characteristic is common to all minerals? A. They are naturally occurring. B. They have the same chemical compositions. C.
    10·1 answer
  • Which of the following will occur when a water molecule bonds with a spider web
    11·2 answers
  • Humans are predators. true or false
    13·2 answers
  • A nurse is assisting a postoperative patient with ambulation. what benefits of early ambulation should the nurse explain to the
    13·1 answer
  • What does the hardness of water describe
    15·2 answers
  • Consuming alcohol inhibits the release of ADH. As a result __________.
    12·1 answer
  • A scientist named Joseph Connell studied two species of barnacles on the shore of a Scottish island. In the area between the ave
    7·2 answers
  • What would be the correct genotypes if you cross two (2) heterozygous guinea pigs?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!