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GrogVix [38]
3 years ago
6

Which of the following contribute(s) to the variation in offspring produced by sexual reproduction?

Biology
1 answer:
fredd [130]3 years ago
8 0

Answer:

The correct answer is E. All of the above

Explanation:

Variation in offspring can be contributed by many different events that change the DNA sequence in gametic cells. These events are crossing over, mutation, independent assortment, and random fertilization.

During the gamete formation, the different genes are assorted independently from the other gametes which results in forming various possible combinations of genes in a gamete increasing the genetic variation.

Crossing over occurs during meiosis between the homologous chromosome that results in exchange of genetic material that brings genetic variation in gametes. During random fertilization, the two gametes fuse and genetic material of two different individual comes to make an offspring which forms a genetical different offspring.

Mutation in the gametic cell is transferred to the offspring during fertilization. Therefore all contributes to variation in offspring produced by sexual reproduction.

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xxMikexx [17]

Cell division is the process by which a parent cell divides into daughter cells.

<h3>Why is cell division important?</h3>

Cell division is important as it helps in the production of identical copies of cell. It also helps in repairing the damaged tissues or cells that are worn out.

The difference between mitosis and meiosis is that mitosis results in two identical daughter cells while meiosis results in four se-x cells.

Mitosis creates diploid daughter cells while meiosis creates haploid daughter cells.

Lastly, the four main phases of cell division include prophase, prometaphase, metaphase, anaphase, and telophase.

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<u>Question</u>:

1. Give two main reasons why cell division is important.

2. What is the difference between mitosis and meiosis.

3. List the four main phases of cell division during mitosis.

6 0
2 years ago
a transmembrane segment of a membrane protein is all made up of alpha helix and contains 22 amino acids. what is the thickness o
gregori [183]

Nine amino acids are needed to travel through the thickness of the membrane.

Alpha-axial helix's distance between amino acids is 1.5. A

The number of gaps between the 22 amino acids in the helix is equal to (22-1) = 21.

Therefore, the helix's length is (21 X 1.5) = 31.5.

One alpha helix is sufficient to span the membrane's breadth, hence the formula is: span of the helix = thickness of the membrane = 31.5 A

The thickness of the membrane is determined by the formula above to be 31.5 AA.

In the beta-strand, there is 3.5 AA between each amino acid.

Therefore, (31.5/3.5) = 9 amino acids are needed.

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6 0
1 year ago
The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms.
Troyanec [42]
If this were to be a true and or false statement, then most bacteria found in soil may be harmful to us, yet to the plants and other organisms that rely on those plants, these bacteria are extremely helpful as they facilitate the recycling of essential nutrients and other ions that plants require such as nitrogen, which ultimately allows traces of nitrogen to be taken in by other consumers within a food chain, a crucial component for growth and development.
8 0
3 years ago
When you move the slide forward on the stage, in what direction does the "e" appear to move when viewed through the microscope?
11111nata11111 [884]

Answer:

it appears to move in the opposite direction

Explanation:

7 0
3 years ago
Identify the three domains and the different groups or kingdoms within each domain (marine science)
andre [41]

Answer:

The three domains are the Archaea, the Bacteria, and the Eukarya.

Explanation:

Prokaryotic organisms belong either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells belong to the domain Eukarya.

8 0
2 years ago
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