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Marta_Voda [28]
2 years ago
11

How does the recesive sickle-cell allele stay in the gene pool

Biology
1 answer:
Zina [86]2 years ago
7 0

Answer:

Because natural selection selects for it. Thus it persists.

Explanation:

You have to understand heterozygote advantage. Basically, it's where heterozygotes have an advantage over homozygotes. In the case of sickle cell disease, heterozygotes have an advantage, and natural selection favors whatever is advantageous. Thus, because heterozygotes each have one recessive sickle-cell allele, as natural selection favors the heterozygotes, the recessive sickle-cell allele persists and remains in the gene pool.

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Many closely related species of ducks have different courtship dances that are performed to solidify a pair-bond. If you were to
damaskus [11]

Answer:

I would expect to see a new phenotype in which the new duck hybrid species would express a new mixed courtship dance with the behaviors of both parentals.  

Explanation:

The cross between both parentals, each from different species, might produce a new phenotype that exhibits both parental dances. The new dance might be considered a hybrid of the parental dances.

Genetically speaking, we can think that there is a gene codifying for the courtship behavior in one species and another gene expressing a different courtship behavior in the other species. This cross´ product would be a hybrid species that exhibits a part of both parentals´ behaviors.

5 0
2 years ago
1) A loja não tinha nenhum freguês, estava às______.
Whitepunk [10]

Desculpe, não falo outras línguas muito bem. Aqui está a tradução para o inglês para que outras pessoas possam ajudá-lo a resolver. Tenha um bom dia!

Explanation:

English for others viewers who want to solve:

1) The store had no customers, it was at ______.

2) It is amazing how you remember everything, you have the memory of________.

3) Always defend your interests: you are always pulling the fire to your ______.

4) He was deceived: he bought _____ for _____.

5) The color is undefined: it looks like the color of _____ when it runs away.

6) How old! It seems from the time of ______.

7) Give up! You can take ______ out of the rain.

8) How about doing a _____, each one gives a little.

9) He got so angry: he released the ________.

10) The house was abandoned, delivered at _____.

11) He became suspicious with a____ behind the ear.

12) Don't rush! Do not pass the car in front of _____.

13) Don't bother me! Go comb ______.

14) Don't tell the secret! Mouth of ______.

15) It was soaked like a wet ______.

16) How can you handle it! Stop swallowing _____.

I know a couple but if someone can translate thier answers to portuguese that will really help.

3 0
2 years ago
How can people keep freshwater renewable for future generations
Radda [10]

By conserving the residential water by recycling we can keep the fresh water as a renewable resource.

<u>Explanation:</u>

Preserving water is significant on the grounds that it keeps water unadulterated and clean while ensuring the earth. Private water use incorporates both indoor and outside family unit water utilization. Water is utilized inside for showering, flushing toilets, washing garments, washing dishes, drinking, and cooking.

Open air water use incorporates washing the vehicle and watering the grass, pools, and plants. This water alludes to the procedure which prepared the wastewater and changes over it to a reusable structure. Additionally gather water during the blustery season to use in latrine flush, watering plants, sprinkle in the nursery, and so on. Utilizing crude water like seawater or non-cleaned water in the latrine is likewise acceptable.

5 0
3 years ago
_____ is 10 to 20 times higher inside the cell, and _______ is 10 to 20 times higher outside the cell.
wolverine [178]

Potassium is 10 to 20 times higher inside the cell, and sodium is 10 to 20 times higher outside the cell. The potential difference across the cell is important in several processes such as transmission of nerve impulses and maintain the ion balance.

The sodium concentration higher out side and potassium higher inside the cell then it moves two potassium into the cell where potassium levels are high and pump three sodium ions out of the cell and into the extracellular fluid.

This is due to action of membrane active transport system which pumps sodium out of the cell and potassium into it. Both helps in body maintain flid and blood volume so it can function normally.

To learn more about active transport system here

brainly.com/question/15454163

#SPJ4

5 0
1 year ago
5 possible benefits from studying biology?
Naya [18.7K]
<span>1.<span>Understanding life. Primarily, studying biology gives you the essentials and primal knowledge of life and how and what you can perceive from it, may it be various fields of zoology, botany or anthropology, psychology, sociology and etc. It lets you understand the different anatomies, physiologies and behaviours on how they act independently, interact and influence one another.  </span></span>
<span>2.Protecting life. It provides a sense of preserving life as your upmost goal in studying biology. You came to an actualization to delve into this science as to be a steward and a developer.</span> <span>
3.Responsibility. It comes with ethics. You become concerned with how actions of a certain populace of a species can affect the entire ecosystem. Human behavior has massive effects to the biosphere.</span>
<span>4.Advancement. The improvement and enhancement on how we can preserve and understand life and the human populace develop and utilize the earth without damaging its vital components.</span>
<span>5.Involve in the current issues and participate. You can be part of a responsible scientist and individual, a citizen of science to stop and help grow the serious concerns of today’s abusive human behaviours and life-threating concerns.</span>




8 0
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