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wel
3 years ago
11

Why is it important for the DNA to double before mitosis

Biology
1 answer:
tekilochka [14]3 years ago
4 0

It is impecable that DNA doubles itself before mitosis because you need the copied DNA to be able to gain more cells. If your DNA did not undergo mitosis then we would forever remain a baby, brain and all.

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What are characteristics of allosteric enzymes? They may have binding sites for regulatory molecules that are separate from acti
stepan [7]

Answer:

The characteristics of allosteric enzymes are listed below.

Explanation:

1 They may have binding sites for regulatory molecules that are separate from the active site.

2 They tend to have sigmoidal curve of V0 vs [S].

3 They undergo conformational change as a result of modulator binding

3 0
3 years ago
A geneticist is studying a disease trying to determine how its inherited. DNA testing was completed on three generations of a fa
Anton [14]

Answer:

X-linked recessive inheritance

Explanation:

Since the disease is primarily present in males vs females, it is a s.ex linked disease.

In X-linked recessive inheritance, males tend to get disease b/c they only have one x (the other is y) which means if they get the bad "x" copy from mom then they definetely will get the disease.

Females can be carriers b/c they are XX. If they get a good copy from mom and suppose a bad copy from dad, they can still be healthy b/c the good copy is dominant. They will be carriers (cuz they have the bad copy) but themselves wont have the disease.

6 0
2 years ago
What theory is supported by the cell cycle?
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Answer:

Reproductive cell cycle theory

5 0
3 years ago
Cells need oxygen to make energy. Oxygen-rich blood is transported to tissues. When the oxygen is dropped off, it needs to move
ikadub [295]

Answer:

capillaries help the blood containing the things a cell needs

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9 0
3 years ago
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The illustration below shows the steps of meiosis I. What is the step that is labeled D? metaphase I metaphase II telophase II t
WITCHER [35]

The right answer is metaphase II.

The process is performed in two nuclear and cytoplasmic divisions, called first and second meiotic division or simply meiosis I and meiosis II. Both include prophase, metaphase, anaphase, and telophase. First division prophase is long and consists of 5 stages: leptotene, zygotene, pachytene, diplotene, and diakinesis. It is at this point that genetic recombination takes place at the level of chiasmus.

During meiosis I, the members of each homologous pair of chromosomes are paired during prophase, forming bivalents. During this phase, a protein structure, called synaptonemal complex form, allows recombination between homologous chromosomes. Subsequently, a large condensation of the bivalent chromosomes occurs and go to the metaphase plate during the first metaphase, resulting in the migration of n chromosomes to each of the poles during the first anaphase. This reduction division is responsible for maintaining the number of chromosomes characteristic of each species.

In meiosis II, as in mitosis, the sister chromatids comprising each chromosome are separated and distributed between the nuclei of the daughter cells. Between these two successive steps, there is no DNA replication. The maturation of the daughter cells will result in the gametes.

7 0
3 years ago
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