Answer:
A substitution is a mutation that exchanges one base for another (i.e., a change in a single "chemical letter" such as switching an A to a G). Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.
<u>The major </u><u>difference</u><u> between bacterial chromosomes and eukaryotic chromosomes is </u><u>Bacteria </u><u>have a single circular </u><u>chromosome </u><u>whereas eukaryotes have several linear chromosomes.</u>
What is a bacterial chromosome called?
Bacterial chromosome is called nucleoid. It is an irregularly shaped and contains genetic material. It is also called as genophore.
What is meant by eukaryotic chromosome?
- Eukaryotic chromosomes are found in the cell's nucleus.
- The DNA inside the nucleus is organized into chromosomes. At the most basic level, a chromosome is a molecule of DNA that is tightly coiled around proteins called histones.
What is the difference between bacterial and human chromosome?
- Bacterial chromosomes are circular in contrast to human chromosomes, which are linear.
- Furthermore, bacterial circular chromosomes are found in the nucleoid area rather than the nucleus, an organelle that is membrane-bound.
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21. B. recessive
22. D. DD and dd
23. D. FF and ff
High pressure to low pressre
In the outbreak of malaria, the frequency of the recessive allele for the HbS gene will increase. The correct option is A.
<h3>What is the HbS gene?</h3>
HbS is a beta-globin gene known as sickle hemoglobin.
It causes sickle cell disease in humans.
The disease is expressed by two HbS variants or one HbS variant or one another beta-globin gene.
Malaria is caused by the plasmodium parasite, which is present in the saliva of the mosquito.
Thus, the correct option is A, the frequency will increase.
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