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Karo-lina-s [1.5K]
3 years ago
14

What type of mutation causes sickle cell anemia?

Biology
1 answer:
Roman55 [17]3 years ago
8 0

Answer:

Sickle cell anemia is the result of a point mutation in the hemoglobin gene. Sickle cell hemoglobin (HbS) causes red blood cells to form a sickle shape. People who inherit one sickle cell gene and one normal gene have sickle cell trait.

Explanation:

Sickle cell anemia is the result of a point mutation in the hemoglobin gene. Sickle cell hemoglobin (HbS) causes red blood cells to form a sickle shape. People who inherit one sickle cell gene and one normal gene have sickle cell trait.

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Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of repli
irina1246 [14]

The Gap 2(G2) stage of Interphase

Explanation:

In a eukaryotic cell, the cell cycle refers to both -cell growth and cell division - leading to the production of identical daughter cells. The cell cycle is basically divided into interphase (I) and mitosis (M).

The interphase, during which the cell grows and replicates its DNA takes place by the following stages – Gap 1 (G1), Synthesis (S), Gap 2(G2).

The cells grow and increase in size during the G1 period.

The G2 phase or the second gap phase the cell utilizes energy and produces necessary proteins for undergoing chromosome manipulation and other organelles and prepares the cell for mitotic cell division.

DNA replication mainly takes place in the Synthesis or the S stage of interphase with each of the chromosomes (46) is replicated.  

Due to this DNA replication in the S stage, its content is doubled (4-N DNA content) when it enters the G2 stage and all the DNA is found within a single nucleus.

6 0
3 years ago
Carbohydrates must be consumed every 3 to 4 hours to prevent depletion of the glucose in our blood.
Varvara68 [4.7K]

Answer: option B) False

Explanation:

The body relies on SEVERAL sources for its energy or glucose supply.

Firstly, understand that Glucose could be supplied from the following:

Glycogenolysis (Glycogen break down induced by Glucagon)

Amino acids metabolism (once amine group is removed)

Fatty acid oxidation.

All of the pathways mentioned can directly or indirectly yeild GLUCOSE, thus making it UNNECESSARY for Carbohydrate meals to be consumed every 3 to 4 hours.

Therefore, the answer is False

4 0
3 years ago
Which are three human-body systems coordinate to cause arm to move? A. nervous, muscular, skeletal; B. respiratory, muscular, di
balandron [24]
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5 0
3 years ago
Read 2 more answers
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boyakko [2]

Answer: B. Nuclear transfer!

Explanation:

Nuclear transfer is the process that DNA goes through to get cloned/copied. The cells that make new forms of DNA create a perfect replica.

Hope this answer helps!

7 0
4 years ago
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djverab [1.8K]

Answer:Generally, the longer ago the last common ancestor lived, the less the organisms have in common. Turtles and tortoises share a common ancestor, but began evolving separately a long time ago. ... Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms.

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