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katrin2010 [14]
3 years ago
11

The sickle-cell allele is pleiotropic (that is, it affects more than one phenotypic trait). Specifically, this allele affects ox

ygen delivery to tissues and affects one's susceptibility to malaria. Heterozygous individuals who have one normal and one sickle-cell allele have a phenotype that has both costs and benefits. The cost: Under conditions of low atmospheric oxygen availability, individuals heterozygous for this allele can experience life-threatening sickle-cell "crises." The benefit: Such individuals are less susceptible to malaria. Thus, pleiotropic genes/alleles reveal that ________.
Biology
1 answer:
butalik [34]3 years ago
4 0

Answer:

adaptations are compromises

Explanation:

The pleiotropic gene involved in sickle-cell anemia is an example of heterozygous advantage. This means that the heterozygous genotype is favourale over other two genotypes (recessive homozygous and dominant homozygous). Eventhough it has harmful effect (sickle cell disease carrier) heterozygous genotype enables resistance to infection (malaria) and that is why this genotype is still favourable by natural selection. This phenomenon is evidence of compromise between harmful ad benefit.

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Given what we know, the three sentences in this question all describe the properties of oceanic crust.

<h3>What is the oceanic crust?</h3>
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Therefore, we can confirm that the sentences in the question describe oceanic crust given that this is the topmost crust during subduction, formed by the solidifying of magma, making it a much denser rock than the other forms of crust.

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5 0
3 years ago
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Answer:

d. All of the above

Explanation: is correct

6 0
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8 0
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Patients: The 2,731 adult patients with septic shock listed in their medical records.

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<h3>What is septic shock?</h3>

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7 0
2 years ago
What process can account for a normal xy male producing a sperm carrying two y chromosomes?
VikaD [51]

The answer is aneuploidy. This is the result of a malfunction in the process of meiosis that produces gametes, in the male.  The is caused by a failure in non-disjunction hence an extra Y chromosome occurs in one of the formed gamete cells during anaphase II.






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