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son4ous [18]
2 years ago
11

SOMEONE PLEASE HELP ME WITH THIS

Biology
1 answer:
sineoko [7]2 years ago
8 0

Answer:

I think it is the last one D

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Why does each parent contribute only one allele to the offspring?
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Answer:

Because the gametes implemented in fertilisation are haploid in nature, in the case of humans, mature gametes contain 23 chromosomes instead of 46 which will then combine with another parents' 23 chromosomes during fertilisation, i.e: 23 (dad) + 23 (mom) = 46 (zygote)

Explanation:

A regular somatic cell has 46 chromosomes, 2n, 2 alleles but the gametes have 23 chromomes, n, 1 allele. The usual significance of this is so that there is diversity in the offspring and the offspring can gain characteristics (bad or good) from both parents.

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2 years ago
To analyze the effects of a new drug for anxiety developed by Solvit Wellness Inc., researchers conduct a study on two groups. B
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Control group

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In an experiment, the group which receives the treatment (in this case injection of actual drug)  is known as experimental group because the experiment is being conducted on it. While on the other hand the group which do not receive the treatment is known as control group. The results obtained from the experimental group are compared with the control group to determine the effectiveness of the treatment.

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3 years ago
In a case-control study, a researcher found no association between exposure to A and disease B. Later she found out that there w
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e

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5 0
2 years ago
2. In polar regions, phytoplankton.
natka813 [3]

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b. thrive during the summer, when sunlight increases

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Phytoplankton production is highly associated with latitude and season. In polar regions, phytoplankton production is reduced to the summer (and eventually spring) season. In consequence, the zooplankton that eats phytoplankton only can survive during the spring and summer seasons. On the other hand, in tropical areas, there exists a nearly constant phytoplankton production all year round.  

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3 years ago
James fills a graduated cylinder with 50 mL of water. He then drops a 60g key into the graduated cylinder. The water level insid
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l Explanation:

dxcfvgbhnjm

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