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Sever21 [200]
3 years ago
5

Which type of mutation causes sickle cell anemia

Biology
2 answers:
Licemer1 [7]3 years ago
7 0
It's a mutation of the gene that makes hemoglobin, and causes lots of pain and sickness.
Hope this helps!
IceJOKER [234]3 years ago
4 0

Sickle cell anemia is an inherited form of anemia, a disease that is characterized by inadequate healthy red blood cells to transport an adequate level of oxygen throughout the body.

Normally, red blood cells are flexible and round, and move easily through the blood vessels. In sickle cell anemia, red blood cells become stiff and sticky, and they are sickle-shaped or crescent-shaped. These irregularly shaped cells can get stuck in small blood vessels, which can slow or block the flow of blood and oxygen to different parts of the body.

This disease occurs due to mutations in the HBB gene, located on the short arm of chromosome 11, which encodes the beta-globin protein. This beta-globin is a subunit of hemoglobin which is found in blood erythrocytes.

Hemoglobin allows red blood cells to carry oxygen from the lungs to the entire body. In sickle cell anemia, abnormal hemoglobin causes red blood cells to become stiff, stocky and deformed.

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Anna007 [38]

Cross pollination is the transfer of pollen of different species to stigma of different species of plants.

Cross pollination results in healthy, viable and diverse plants.

Mendel observed that traits could either be dominant or recessive.

Blended traits or incomplete dominance is the condition in which dominant allele could not produce its trait alone instead blending with recessive allele takes place giving new phenotype to progeny.

Explanation:

In cross pollination pollen transfer takes place from anthers to stigma. In Mendelian genetics the anthers of the plant was removed because it has both male and female parts on same plant so that self pollination does not take place.

The importance of cross pollination is that it creates diversity in the plant species since the traits having different alleles are combined to form the progeny plant. The offspring are healthier and high quality seeds are found.

Mendel observed that traits are either dominant or recessive in general.  It was observed that when homozygous parents were crossed, the progeny in F1 generation always had dominant trait. The recessive trait only appeared when F1 generation offspring were self pollinate.

Blended traits or incomplete dominance appear when alleles get blended and exhibit the traits in phenotype. The phenotype appeared will not be matching with either parents.

The example is a white coloured flower is crossed with red colour flower the resultant colour of the flower is pink. It shows that dominant allele red is not completely dominant and gets blended with white colour.

7 0
3 years ago
I was supposed to describe my personality, talents, and passions
OLga [1]
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