menu
bartleby
search
close search
Hit Return to see all results

A man, Penoy, whose sister died in early childhood from a recessive lethal disease marries a woman Esmae, who has the same family history. Because Penoy has survived beyond childhood, he does not have the disease, but he may be a carrier (i.e. heterozygous, as may also be the case with Esmae). What is the probability that their first child will suffer from the disease? [Hint: first calculate the probability that Penoy is heterozygous; then determine the probability that both parents are carriers. Remember that he has survived to adulthood when calculating this probability].

Question

A man, Penoy, whose sister died in early childhood from a recessive lethal disease marries a woman Esmae, who has the same family history. Because Penoy has survived beyond childhood, he does not have the disease, but he may be a carrier (i.e. heterozygous, as may also be the case with Esmae). What is the probability that their first child will suffer from the disease? [Hint: first calculate the probability that Penoy is heterozygous; then determine the probability that both parents are carriers. Remember that he has survived to adulthood when calculating this probability].



check_circleAnswer
Step 1

In the given scenario, as the male survived beyond childhood but is a carrier of the disease, it could be possible that it is an autosomal recessive disease. So, as per the question, there can be two scenarios:

Case 1: The man is the carrier (XaY) and the woman is unaffected (XX). In this case, XaX, XaX, XY, XY are the possible genotypic combinations. So, the female offsprings will be carriers of the disease while the male offsprings will remain unaffected. Hence, the probability of the first child to be affected is 0.

Case...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Our solutions are written by experts, many with advanced degrees, and available 24/7

See Solution
Tagged in

Science

Biology

Genetics

Related Biology Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: what was the first element formed in the universe

A: The Big Bang Theory is the leading explanation about how the universe began. It explains that the un...

question_answer

Q: How do you do this? can you explain and show me? Replication Given Original DNA strand: ATCCTAGCC. G...

A: Replication is the process by which a double stranded DNA molecule is copied to produce to identical...

question_answer

Q: Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several a...

A: Gymnosperms are the ‘naked seed’ containing plants which are usually flowerless. These produce seeds...

question_answer

Q: If beta cells were destroyed, blood sugar levels would ____ (increaseor decrease). which disorder is...

A: Pancreatic beta cells are responsible for the production of insulin.

question_answer

Q: —A 40 year old male has just been diagnosed with amyotrophic lateral sclerosis, better known as Lou ...

A: Lou Gehrig’s disease, also known as amyotrophic lateral sclerosis (ALS), refers to degeneration of m...

question_answer

Q: The femoral region is promixal or distal to the crural region?

A: The anatomical region located at the upper third portion of the thigh is termed as the femoral trian...

question_answer

Q: Which organ system is found in both plant and animals?

A: The system which is common between plants and animals is the circulatory system. The circulatory sys...

question_answer

Q: Number 3. I would say no burn  can’t  explain why’s exactly. IS it right? And how would I explain wh...

A: Escherichia coli abbreviated as E. Coli is a bacterium commonly found in the digestive system of war...

question_answer

Q: What are the steps in visual processing?

A: The term visual processing refers to the ability of the brain to interpret and process the visual in...

Sorry about that. What wasn’t helpful?