genetics question please help

[danbarr]

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a woman carries a sex linked lethal gene that causes spontaneous abortions she has six children. how many of her children would you expect to be boys??

I"m lost guys....the answer is 2 boys??? please help anyone???

 

[Mrbubbles]

a woman carries a sex linked lethal gene that causes spontaneous abortions she has six children. how many of her children would you expect to be boys??

I"m lost guys....the answer is 2 boys??? please help anyone???

she's a carrier.. do a punnett square with a normal man (XX^c *XY)

so that means, there is a 50 percent chance that the boys will normal and 50% have the trait -->therefore die!..so in reality, she has 8 children (4 boys 4 girls but only 50% of the boys die leaving u with 2 boys..

so 4 are girls..2 are boys (that didn't receive the trait)..

yeah this question is worded VERY poorly.

 

[danbarr]

I think I got it now......thank you sooooomuch!!! I appreciate it......