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sleet_krkn [62]
4 years ago
12

A couple has three offspring: one child with an autosomal dominant disease trait and two who are normal. the father is affected

by the autosomal dominant disease, but the mother does not have the disease gene. what is the recurrence risk of this autosomal dominant disease for their next child?
Biology
1 answer:
Firdavs [7]4 years ago
7 0

the ratio would be 1:4 by Punnet Squares

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Help me plzz i need help right now I am really confused at this
OverLord2011 [107]

Answer:

offsprings have identical genes. It's called asexual reproduction.

5 0
3 years ago
Which of the following statements is NOT true about the Calvin cycle?
Umnica [9.8K]

Answer:

C

Explanation:

because of something

8 0
3 years ago
The thin strand of pia mater that helps to anchor the spinal cord to the coccyx is the
Marysya12 [62]

Answer:

filum terminale

The filum terminale is a thin strand of pia mater that helps anchor the conus medullaris to the coccyx

6 0
2 years ago
DNA sequences can act as "tape measures of evolution". Some highly conserved regions of the human genome (similar to comparable
Lubov Fominskaja [6]

Explanation:

The DNA contains many regulatory sequences that are very important, even though they do not code for proteins.

For example, the expression of every gene is regulated by a region called the Promoter. The promoter sequence, located close by the coding region of the gene, usually binds the RNA polymerase (the enzyme that transcribes genes into mRNA) as well as other proteins necessary for transcription,

The promoter sequence, thus, does not itself code for proteins, but is essential for transcription and must be highly conserved so that the RNA polymerase can find it.

8 0
3 years ago
Read 2 more answers
Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh
Molodets [167]

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

4 0
3 years ago
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