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Orlov [11]
3 years ago
12

When examining cells in the laboratory, you notice that a particular cell has half as much DNA as the surrounding cells. This ob

servation can be explained if this cell's cell cycle halted at checkpoint _____.
Biology
1 answer:
Dovator [93]3 years ago
8 0

Answer:

G1

Explanation:

The cell cycle is divided into 2 main phases namely:

  • The interphase
  • The m phase

While the m phase is the active division phase, the interphase is further divided into:

  • G0 phase which is essentially a resting or quiescence phase for cells that do not need to divide ordinarily.
  • G1 phase which is characterized by growth and development of the cell.
  • S phase which is a phase during which DNA is synthesized
  • G2 phase during which protein is synthesized.

<em>Hence, if a cell is noticed to have half as much DNA as the surrounding cells, it means that particular cell's cell cycle halted at G1. The cell has not been able to synthesize DNA unlike the surround cells.</em>

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Answer:

See the answer below

Explanation:

For two normal parents to have produced a daughter who suffers from AGG, <u>it means the disorder is an autosomal recessive trait. In order words, it means the parents are both carrying the allele for the disorder in recessive form</u>.

Let us assume that the allele for the disorder is represented by b, meaning that the alternate form would be B. <u>Both parents will have the genotype Bb</u> and will both appear normal.

      Bb    x    Bb

    BB   Bb   Bb   bb

The affected child would be the one with bb genotype while the remaining children would appear normal. See the attached image for the Punnet's square analysis of the cross.

The genotypes of the parent would be heterozygous.

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3 years ago
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Answer:

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Three human disorders−−fragile X syndrome, myotonic dystrophy, and Huntington's disease−−are conceptually linked by a common mod
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Answer:

The correct answer is ''All three are caused by disparate genes, but each gene was found to contain repeats of a unique trinucleotide sequence.''

Explanation:

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