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frosja888 [35]
3 years ago
6

Two important checkpoints that regulate the cell's progression through the cell cycle occur in the _____ and _____ phases of the

cell cycle. See section 12.3 (page 264) .
Biology
1 answer:
Galina-37 [17]3 years ago
6 0

Two important checkpoints that regulate the cell's progression through the cell cycle occur in the G1 and G2 phases of the cell cycle.

G1 (restriction) checkpoint  - the cell becomes committed to entering the cell cycle

G2 checkpoint - chromosomes have replicated successfully.


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Please help me out with these practice questions.<br> Thank you!
Oduvanchick [21]

Answer:

1. B.

2. B.

3. A.

Explanation:

1. So, the mother does not but the father does carry the gene for polydactyly. Which means that, the offspring was born Pp and, the dominant trait (P) was exposed.

2. A heterozygous trait is one that has both allele forms (in this case, d and D. If both of the parents are Dd, the offspring will also be Dd, and therefore, he has 1/2 chance of being born deaf.

3. Both you and your spouse will be heterozygous (Ee), therefore, since unattached earlobes are dominant

3.1 When two heterozygous traits are bred, you will get the following combinations: yy, Yy, Yy and YY. Which means that your offspring had a 1/4 chance of having attached earlobes, and that is what happened.

3.2 The third option is incorrect, because when you breed 2 homozygous recessive (ee) traits, all of your offspring will be homozygous recessive (ee), which means that the parents would have to be homozygous recessive, but, they cannot since the dominant trait has applied to them.

4 0
3 years ago
1) Can anyone say any sources of Natural fibres <br> 2) What are some uses of Natural fibres
horsena [70]

Answer:

1) Natural fibers come from many sources. These sources can include plants, animals, and minerals. We are probably most familiar with plant and animal fibers from a consumer standpoint. Common natural fibers sourced from the plant kingdom include cotton, flax, hemp, bamboo, sisal, and jute

2) Benefits of a high-fiber diet

Normalizes bowel movements. Dietary fiber increases the weight and size of your stool and softens it. ...

Helps maintain bowel health. ...

Lowers cholesterol levels. ...

Helps control blood sugar levels. ...

Aids in achieving healthy weight. ...

Helps you live longer.

5 0
2 years ago
Read 2 more answers
A single pair of goldfish in an aquarium produced a large number of offspring. These offspring showed variations in body shape a
vagabundo [1.1K]
The most likely explanation for the variation is the offspring were produced from different combination of genes. A single pair of gold fish mentioned in the question means a male and a female gold fish. The two of them mated and contributed different genes to the fertilized fish eggs, this results in production of various body shape and colouration which is known as variation.
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3 years ago
A list of the cell fibers from largest to smallest would read: 1. microtubules, intermediate filaments, microfilaments
Dahasolnce [82]

A list of the cell fibers from largest to smallest would read:  

1. microtubules – is a microscopic tubular structure that is present in numbers in the cytoplasm of cells. These are usually aggregated to form complex structures. 

<span>2. intermediate filaments – are cytoskeletal components that is usually found in the cells of vertebrate species and </span>other organisms like plants, fungi, unicellular organisms. 

3. <span>Microfilaments – are filamentous structures that can be found in the cytoplasm of eukaryotic cells and it will form part of the </span>cytoskeletons<span>. They are composed primarily of polymers of actin. But in cells, they usually interact with other proteins.</span>

4 0
3 years ago
Which factor that affects biodiversity?
iVinArrow [24]

Answer: Pollution, climate change, habitat loss, or invasive species

3 0
3 years ago
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