easy Bio Q

[tRNA]

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achiever #40 Test3 in the explanation it says "sperm doesn't contain X chromosome"

but if that's true, how then is it possible to get baby girls??, I always thought since the mom can only contribute X then if the sperm has another X you get a baby girl, if the sperm has a Y then you get a baby boy

 

[Mstoothlady2012]

achiever #40 Test3 in the explanation it says "sperm doesn't contain X chromosome"

but if that's true, how then is it possible to get baby girls??, I always thought since the mom can only contribute X then if the sperm has another X you get a baby girl, if the sperm has a Y then you get a baby boy

yea what you are saying is right. I think achiever made a mistake there. It should say sperm cannot carry both X & Y at the same time.

 

[flycd05]

so eggs only have X's while sperm only carry Y's right? what do u mean they can't carry both XY at the same time - isn't that what males carry (both XY)?

 

[gbloomq2010]

the sperm is haploid remember. so it either is X or Y. When a male produces sperm. About half will be x and half will be y. Where a female will always donate an X. So whether the sperm is x or y determine is a girl or boy is produces respectively. Im not 100 percent sure on the accuracy of my explanation but thats how I understand it. So someone please correct me if im wrong.