A female that is homozygous for an X-linked dominant trait is expected to pass on the trait to what proportion of her children?

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Biology

Mikayla Lawson

22 March, 10:14

A female that is homozygous for an X-linked dominant trait is expected to pass on the trait to what proportion of her children?

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Davin Melton · Answer 1

She has a 50% chance of passing the gene to her likeable sons and daughters in equal proportions of 50-50% assuming the inheritance is based on Mendel's Mono hybrid cross with each of the sex-linked gene moving into each of the offspring boys and girls.

Assuming the husband is normal. the man will give normal Y-chromosomes and the mother will give either of defective allele (XX), so the boys, will all be sex-linked for the traits. Since boys sex genotypes are XY, XY However. the girls will be carrier.

if the man also has the trait (defective X, but free Y, then), all the girls will have the sex linked - traits, and be dominant for sex-linked allele like the mother. since two defective sex-linked traits of XX (one from the father, and one from the mother will be inherited will be inherited.