BIOLOGY HIGH SCHOOL

What will happen to the frequency of the recessive allele for the HbS gene when there is an outbreak of malaria?

Answers

Answer 1
Answer: The answer is the frequency of the recessive allele will increase.

HbS gene is a variant of the β-globin gene responsible for sickle hemoglobin. Sickle-cell anemia is a recessive disorder caused by the presence of two recessive alleles. But, when there is an outbreak of malaria, frequency of the recessive allele for the HbS gene will increase. This is because in an area with malaria, heterozygous individuals (with one dominant allele and one recessive allele) have an advantage. These individuals will have both normal and sickle hemoglobin. But pathogen that causes malaria affect only normal hemoglobin, so heterozygous individuals are more resistant to malaria.
Answer 2
Answer:

Answer: The frequency of the recessive allele increases

Explanation: The HbS gene is a variant of the B-globin gene which is responsible for sickle hemoglobin. There is a recessive disorder called sickle cell anemia that is caused by someone having two recessive alleles. When there's an outbreak of Malaria the frequency of the recessive allele of the HbS gene increases because people that are heterozygous have the advantage due to the fact they have normal and sickle hemoglobin so they are more resistant to malaria because malaria will only take action on normal hemoglobin.

I hope that helps you :)

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1. Which of the following is responsible for transmitting an impulse across a synapse to another cell?

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You didn't really provide any possible answers here. However, it's very easy to say that the responsible actors for impulse transmission across the synapses from one nervous cell to another nervous cell is what we call neurotransmitters. These are special molecules that can have different effects when binding onto the required receptor sites. 

Which organism obtains its energy from dead or decaying matter?

Answers

Answer:

saprotrophs or saprophyte

Explanation:

A saprophyte or saprotroph is an organism which gets its energy from dead and decaying organic matter. This may be decaying pieces of plants or animals. They are consumers in the food chain.Bacteria and fungi are important saprotrophs.

Answer: Saprophyte is the organism obtains its energy from dead or decaying matter

Explanation: Saprophytes don't have chlorophyll and therefore, cannot prepare their food. They obtain nutrients from dead and decaying matter. Digestive juices secrete by the saprophyte on dead and decaying matter and convert it into a solution. They then absorb the nutrients from it. These enzymes convert organic food substance into a simple one.

The soupy food that is sent to the small intestines is called chyme.


TrueFalse

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True! 
Hope this helps you!

Answer:

True

Explanation:

Chyme

The Digestive System

Why is cellulose freely permeable?​

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