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#1
06-06-2013
 USMLE Forums Addict Steps History: Not yet Posts: 125 Threads: 17 Thanked 66 Times in 38 Posts Reputation: 76
genetic question

man and woman are affected by AD disorder with 80% penetrance in all affected individuals. they are heterozygous , what is the probability they will produce phenotipicaly normal offspring?

A 0.6
B 0.5
C 0.25
D 0.4
E 0.3

#2
06-06-2013
 USMLE Forums Scout Steps History: 1+CK+CS Posts: 61 Threads: 15 Thanked 9 Times in 8 Posts Reputation: 19
hi

Quote:
 Originally Posted by irakly man and woman are affected by AD disorder with 80% penetrance in all affected individuals. they are heterozygous , what is the probability they will produce phenotipicaly normal offspring? A 0.6 B 0.5 C 0.25 D 0.4 E 0.3
is it 0.5?
#3
06-06-2013
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,109 Threads: 31 Thanked 520 Times in 394 Posts Reputation: 539

Quote:
 Originally Posted by irakly man and woman are affected by AD disorder with 80% penetrance in all affected individuals. they are heterozygous , what is the probability they will produce phenotipicaly normal offspring? A 0.6 B 0.5 C 0.25 D 0.4 E 0.3
Well Irakly where do u get these questions from.
Hmmm I would go in for
D 0.4
Am I correct?
__________________
In USMLE, “Any fool can know. The point is to understand.”
#4
06-06-2013
 USMLE Forums Addict Steps History: Not yet Posts: 114 Threads: 23 Thanked 19 Times in 18 Posts Reputation: 38

0.75 by 0.8 = 0.6 thenn 100 - 0.6 =0,4 ????
#5
06-07-2013
 USMLE Forums Addict Steps History: Not yet Posts: 125 Threads: 17 Thanked 66 Times in 38 Posts Reputation: 76

75%(50% heterozygous and 25% homozygous) or 0.75 x 0.8(80%)=0.6
1-0.6=0.4
 The above post was thanked by: nsesereso (06-07-2013)
#6
06-07-2013
 USMLE Forums Addict Steps History: Not yet Posts: 125 Threads: 17 Thanked 66 Times in 38 Posts Reputation: 76

Quote:
 Originally Posted by nsesereso well irakly where do u get these questions from. hmmm i would go in for d 0.4 am i correct?
question is from kaplan qbank
#7
06-07-2013
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,109 Threads: 31 Thanked 520 Times in 394 Posts Reputation: 539

Quote:
 Originally Posted by irakly question is from kaplan qbank
Oh ok I am still reading so would do Kaplan qbank later.
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In USMLE, “Any fool can know. The point is to understand.”

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