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28 September, 03:08

How is the sickle-cell allele maintained through natural selection?

A. Mosquitoes that pass along the parasite also pass on the recessive alleles.

B. Individuals with two recessive alleles have very high rates of reproduction

C. Individuals with two dominant alleles have very low rates of reproduction

D. Heterozygous individuals pass the dominant and recessive alleles to offspring

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Answers (2)
  1. 28 September, 06:00
    0
    Individuals with two recessive alleles have very high rates of reproduction

    Explanation:

    When two heterozygous individuals AS and AS get married, they eventually pass either the dominant or recessive alleles to their offsprings. Some of the offspring will be homozygous for the sickle cell allele, some may be heterozygous while some may not have the sickle cell allele at all.

    Individuals that are heterozygous for the sickle cell allele live longer and have a greater chance of reproduction thereby passing on the homozygous sickle cell allele to their offspring.

    Hence, by sexual
  2. 28 September, 06:41
    0
    The answer is D. Heterozogenous individuals pass the dominant and recessive alleles to offsrping.

    This condition actually restricts the effects of malaria in our body.

    The blood of the carrier is changed by the dominant allele, making it diffucult for malaria to enter the body.
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