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iogann1982 [59]
3 years ago
10

Most sex-linked, recessive traits-including hemophilia and color blindness-appear in males. This phenomenon is BEST explained by

which statement?
A. In males, the recessive sex-linked genes appear only on the Y chromosome.

B. Males have an XX chromosome with dominant genes.

C. In males, the Y chromosome lacks the genes needed to mask the recessive genes on the X chromosomes.

D. Most of the genes on the X and Y chromosomes of males are recessive.
Biology
2 answers:
nekit [7.7K]3 years ago
8 0

the answer is d, most of the genes on the X and Y chromosomes of males are recessive.

iogann1982 [59]3 years ago
7 0
Your answer would be D
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Answer:

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GENERAL RECOMBINATION OR HOMOLOGIST

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           Suppose we have an exogenote and an endogenote, both consisting of double helices. In recombination models, the exogenote is usually referred to as donor DNA, and the endogenote as recipient DNA.

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2) The gap left by the displaced portion of the donor cut chain is filled by reparative DNA synthesis.

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It is important to highlight that this process promoted by RecA depends on the donor and the recipient having great sequence homology (from 100 to 95%), and that these homology segments are more than 100 bases in length.

Note that this synapse involves the formation of a portion of heteroduplex in the double receptor helix: there is an area where each chain comes from a DNA c.d. different parental (donor and recipient).

5) It is assumed that the newly displaced chain of the recipient DNA (D-structure) is digested by nucleases.

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b) If the cuts and splices affect the same chains that had already participated in the first cross-linking, the result will consist of two double helices that present only two portions of heteroduplex DNA.

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