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
ikadub [295]
3 years ago
6

Cystic fibrosis in humans is caused by recessive mutations in a single gene located in an autosome and follows mendelian laws. a

normal couple has two children. the first child has cystic fibrosis, and the second child is unaffected. what is the probability that the second child is a carrier (heterozygous) for the mutation that causes the disease? (hint: we already know that the second child is not homozygous recessive)
Biology
1 answer:
lara [203]3 years ago
4 0
I think the probability would be 50% bc there are four options FF Ff fF and ff. Half of those are heterozygous (the child would be a carrier). So I think it's 50%. However, if we already know that the child will not have the ff combination, then we could say that there are only three other options (so maybe it's 60%?) but that's probably just me being a smartass.
You might be interested in
Hormones are chemical molecules produced by indoor green glands one such endocrine gland is the thyroid gland which synthesizes
Veronika [31]

Answer:

555

Explanation:

7 0
3 years ago
What is the difference between conduction and convection?
Maslowich
Conduction and convection are means of transferring heat, the important difference is the medium through which the heat travels. Conduction occurs when heat is transferred through solid objects, like a bar.
3 0
3 years ago
Read 2 more answers
Which of the following statements is INCORRECT about how the components of hemoglobin are recycled?
Over [174]

Answer:

C

Explanation:

The globin of the RBC is broken down into constituent amino acids that can be reutilized by the phagocytic cells (this can occur in the spleen, liver and lymph node). The chains cannot be reused in their large form. The heme(iron) is transported by the blood to the bone marrow and is used to make new red blood cells.

5 0
3 years ago
Duchenne muscular dystrophy is an X-linked recessive disease. A phenotypically normal couple wants to start a family. The woman’
Andreyy89

Answer:

\frac{1}{8}

Explanation:

From the question: Duchenne muscular dystrophy is an X-linked recessive disease.

Now for an X-linked recessive disorder to be affected by a male individual; it only requires the presence of only one copy of the recessive allele of the disease to be present BUT in a female individual. both copies of the recessive allele must be present.

Let the X-linked recessive disease(i.e Duchenne muscular dystrophy) be = (ⁿ)

However, we are told that the couples are normal and are unaffected. Therefore;

the male partner (XY) will be:   X^NY

the female partner (XY) will be: X^NX^N

Similarly, the question proceeds by telling us that: the woman's brother has the disease.

Definitely, it's possible that this unaffected woman is a carrier of the disease.

So, if she is a carrier; we have her traits to be: X^NX^n

NOW, if a cross exist between these couples; we have

X^NY     ×        X^NX^n

                     X^N                         Y

X^N                X^NX^N                  X^NY

X^n                 X^NX^n                   X^nY

So, we have offspring as follows:

X^NX^N  = normal unaffected female  

X^NY     = normal unaffected male

X^NX^n   = female carrier for the Duchenne muscular dystrophy disease

X^nY      = affected male with the Duchenne muscular dystrophy disease

So, the probability of the child to be affected with the disease = \frac{1}{4}

Also, the probability that the first child will be a male or a female = \frac{1}{2}

∴

the  probability that the couple’s first child will be affected = \frac{1}{4}*\frac{1}{2}

=\frac{1}{8}

4 0
3 years ago
Please helpppppppppp
Ugo [173]

Answer:

The independent variable is excessive noice exposure

The dependent variable is hearing

Explanation:

sorry for you having to wait so long have a mildly amazing day like me lol

3 0
3 years ago
Other questions:
  • Which enzyme is responsible for facilitating the hydrogen bonding between the nucleotides in a new DNA molecule
    7·1 answer
  • The psychiatrist credited with labeling schizophrenia as dementia praecox was _____.
    7·1 answer
  • Which statement best describes the movement of carbon dioxide into or out
    7·1 answer
  • What is the term for the junction between one nerve cell and the next called?
    5·1 answer
  • Immediately following the arrival of the stimulus at the axon terminal of a motor neuron there is a short period called the ____
    5·1 answer
  • The epidermis of a plant functions like what part of an animal
    5·1 answer
  • What two environmental factors influence the shape of proteins?
    6·1 answer
  • ASAP Describe the levels of protein folding- primary, secondary, tertiary & quaternary structure of proteins.
    9·1 answer
  • Which of the following statements is true?
    5·1 answer
  • Adults of species in the order ___ have 2 wings and the greatest variety of mouthparts. Group of answer choices Isoptera Coleopt
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!