QuestionSBA
QuestionChoice
This is incorrect as the patient has an autosomal recessive condition, so a child can never be a 100% carrier of the condition.
10023504
e
100%
QuestionChoice
As the mother has an autosomal recessive trait and the partner does not have the trait, the child has a 50% chance of being a carrier of cystic fibrosis. The child will not inherit the disease.
10023500
a
50%
QuestionChoice
As the mother has the disease trait, there will always be a 50% chance that the child is a carrier and a 50% chance of the child being homozygous normal (i.e. not having any cystic fibrosis trait at all).
10023501
b
0%
QuestionChoice
This would be the likelihood of a child having cystic fibrosis if one parent was a carrier and the other parent had the disease.
10023503
d
75%
QuestionChoice
This would be the likelihood of a child having cystic fibrosis if both patients were carriers.
10023502
c
25%
Concept
Chapter
2693
4451
Autosomal recessive conditions
Topic
156
Medical Genetics
17098
A 26-year-old woman becomes pregnant and is screened for hereditary conditions. It is found that she is a carrier for cystic fibrosis which is an autosomal recessive condition. Her partner is screened for cystic fibrosis and is found to not have the trait or be a carrier.

What is the likelihood of the child being a carrier for cystic fibrosis?
a