Aresearcher has identified a mutation in mouse cells that results in these cells having abnormally low

10 answers
Question:

Aresearcher has identified a mutation in mouse cells that results in these cells having abnormally low levels of pax3 (a gene involved in muscle development) gene transcription. he determines that this is a result of a mutation affecting a promoter-proximal element. this mutation:
a. occurs upstream of the pax3 promoter.
b. may occur in a ccaat box. may occur in a gc-rich box.
c. may affect the ability of regulatory proteins to associate with pax3
d. all of the answers are correct.

Answers

1-Differntiation -
2-structure
3-mitosis
4-
5-true

2. During differentiation, certain genes are activated to produce proteins that enable specific functions.

3. Meiosis results in offspring with genotypes that are not exact copies of the parents.

4. DNA replication occurs before the division of the nucleus.

5. I can't answer without the image.

6. ovary cells (and testes in males)

7. I can't answer without the image.

8. It was passed to the individual by a gamete from the father.

9. 3n

11. Need the diagram.

B) Nondisjunction.

Explanation: Syndromes such as triple X syndrome, Turner's syndrome, Down syndrome, and Klinefelter's syndrome occur because of nondisjunction, or the improper separation of the chromosomes during division. In each of these cases, an extra chromosome (X chromosome for triple X, chromosome 21 for Down syndrome, etc.) causes symptoms in the offspring. In some syndromes, such as triple X syndrome, the symptoms are often not very noticeable.

b. involves formation of free radicals.

Explanation:

Reperfusion injury is the injury that is caused by the damage of the tissues and cells due to deficiency of supply of oxygen to the cells through blood.  This results in the formation of the free radicals typically when the high energy electrons reduce the available oxygen to the tissues. This results in more damage to the tissues than the hypoxia.

The first one would be  the correct answer

Explanation: Mitosis is important for growth ans repair, while meiosis occurs in cells involved in sexual reproduction. Why, because, mitosis, which produces genetically identical cells, is the basis of growth, tissue repair and asexual reproduction. The other form of division of the genetic material is called meiosis.  Meiosis is a process that shares mechanisms with mitosis, but it should not be confused with it, since meiosis is typical of the cell division of gametes. It produces genetically distinct cells and, is the basis of sexual reproduction and genetic variability.

"Causes cells to change type and become specialized."

Hope this helps!

-Payshence

4. DNA replication occurs before the division of the nucleus.

5. The question is incomplete, the diagram of the question has been attached as an image. The correct answer is meiosis.

6. Ovary cells.

Explanation:

QUESTION 4:

Before any cell undergoes division; whether meiosis or mitosis, its DNA must be replicated or duplicated in order to ensure that each daughter cell receive the correct number of chromosomes. This process of DNA replication involves the unwinding of the double-stranded DNA by HELICASE, and the synthesis of a new DNA strand.

N.B: Meiosis occurs only in reproductive cells.

QUESTION 5:

The diagram has been attached. It displays a female reproductive system showing the fallopian tube where the female gamete (ovum/egg) passes. The egg which is labelled X is produced by the ovary during meiosis.

Meiosis is the cell division that results in daughter cells (gametes) with each having their chromosome number reduced by half. i.e. a diploid (2n) female will produce haploid eggs (n)

QUESTION 6:

Meiosis occurs only in reproductive cells. It is a cell division that gives rise to gametes or sex cells used during reproduction. Ovary is the female reproductive organ that produces the female gamete (egg). Meiosis occurs in the diploid germ cells of the ovary and results to haploid cells called egg or ovum.


[tex]4. which statement is true of both mitosis and meiosis? both occur only in reproductive cells. dna[/tex]

A

Explanation:

causes cells to change type and become specialized.

Explanation:

Cell differentiation is the set of processes that transform an undifferentiated embryonic cell into a specialized cell or the result of the performance of a series of expression controls, which tend to specialize the physiology and also the morphology of a cell, effectively enabling it for a function to the detriment of many others.

Differentiation starts with embryogenesis (gastrulation) due to the effect of morphogenesis. Cell differentiation corresponds to the degree of specialization, potentiation, capacity of the cell of origin to other types of cell, the stem cell has a high degree of potentiation and differentiation.

nondisjunction

Explanation:

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