Biology, 20.10.2019 20:30 Stevencriollo6838

Why is the frequency of x–linked disorders greater in males compared to females?

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Because males possess only a single copy of the X chromosome (genetically, males are XY) whereas females possess two copies of the X chromosome (genetically XX).

As an aside, in case your teacher drops this on you, males receive their X chromosome from their mothers, since the Y chromosome would have to come from their fathers.

Lastly, a female would be considered a "carrier" if only one of her two X chromosomes was associated with an X-linked disorder (one normal X chromosome and one that was associated with the X-linked disorder). Carriers generally are asyptomatic, but pass the abnormal X chromosome to their male children in roughly 50% of cases (since there is a 50-50 chance of their passing the abnormal X chromosome)

Hope this helps!

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cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are important factors here. as a cell increases in size, its surface area and volume increase as well. we call that the surface area to volume ratio (sa: vol). but the catch is that volume increases at a greater rate than surface area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow! check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

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1. aspect is nothing really because the answer is right in front of your face
Biology worksheet 100 pts ! if you have any questions put them in the comments section and not th

Biology worksheet 100 pts ! if you have any questions put them in the comments section and not th

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