Question

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What could the genetic counselor tell the couple to help them understand how their children inherited cystic fibrosis?


One of you has a mother who is also a carrier of cystic fibrosis.

One of you has a father who is also a carrier of cystic fibrosis.

Both of you have either a mother or a father who is also a carrier of cystic fibrosis.

Both of you had a mutation of the cystic fibrosis gene in a cell that divides to form gametes.

Answer 1

@PRAETORIAN.10

Answer 2

Its D

Answer 3

It will be D because non them had a father or mother having cyctic fibrosis gene, it occured abrupty first time in there genotype only, thats mutation

Answer 4

and that explains stage II of heterozygous male and female ?

Answer 5

yes

Answer 6

....

Answer 7

what ?

Answer 8

^

Answer 9

not sure i concur

Answer 10

i agree that nothing like this 'mutation' has been seen before in their ancestors

Answer 11

Yes

Answer 12

The point i tried to xplain in the above lines is why its mutation or why the answer is D and not C \(\color{green}{\huge\ddot\smile}\)

Answer 13

however if stage III is supposed to be them, then stage II presumably their parents, have definately been diagnosed with something

Answer 14

ie. heterozygous

Answer 15

@Abhisar it is likely you are correct, but i just dont see it yet.

Answer 16

Dfntly but the question states couple, when u go to a genetic counselor he makes a pedigree analysis such as in the figure

Answer 17

Stage II is showing couple, Stage III is showing Offsprings Isnt it ?
@PRAETORIAN.10

Answer 18

Affirmative.

Answer 19

Thank you.

Answer 20

\(\Huge\text{Anytime !}\)
\(\huge\ddot\smile\)

Answer 21

Thats what i said before.....

Answer 22

oh well, alls good

Answer 23

i am just a sceptic

Answer 24

have an epic day poeple

Answer 25

people*