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Sex-linked genes

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Sex-linked genes

Postby Waters2 » Thu May 26, 2005 12:43 pm

Sex linked genes heve one homologous pair of chromosomes are involved in the determination of sex chromosomes and the other chromosomes are called autosome. By what way to distinguish inheritance involving sex-linkage from autosomal linkage????
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Postby mith » Thu May 26, 2005 1:10 pm

Usually thru pedigrees, you would see abnormally high ratio of males to females getting the trait.
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Postby Niqqie » Thu May 26, 2005 2:16 pm

A female has two X chromosomes, a male only one. If the disease is X-linked, the male won't have a healthy copy of the allele to rescue its phenotype; a female will be heterozygous, so there can be rescue of function. A Y-linked disease will always be passed on from father to son.
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Postby 2810712 » Thu Jun 02, 2005 6:11 am

X-linked traits show criss-cross inheritance , i.e. mother -to- son - daughter - grandson etc.
For X-linkeds females can be carriers i.e. they don't express the reccessive trait but carry one allele for it on one of their X chomosome , such females can lead to inheritance of trait in the subsequent progeny. These reccessive alleles are expressed in males as they have sinlge X chromosome.this is only for reccessive X-linked traits .
Dominant genes are always expressed. So, u can guess the inheritance.

By the way Sex-linked thigs are banned ,
so use X-linked or Y-linked

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Postby MrMistery » Fri Jun 03, 2005 7:45 pm

I agree, the term sex-linked only causes confusion. It is fine for teaching genetics 101, but that's about it. X-linked and Y-linked are much better. Very well pointed out, numbers(i'm gonna call you that because i can not memorize your name)
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Postby 2810712 » Tue Jun 07, 2005 4:07 am

Thanks Andrew , u can call me Shree.

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Postby Poison » Tue Jun 07, 2005 6:47 pm

Can we call you Shree too? :)
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Postby 2810712 » Thu Jun 09, 2005 2:19 am

NO, its banned for girls and espesially those from countries lying in 2 continents !!! :wink:

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Postby Poison » Thu Jun 09, 2005 6:36 pm

Ok. So I must go on calling you with those numbers, 2810712. :P :lol:
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