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scZoUnD [109]
3 years ago
7

Explain the difference between crossing over and genetic variation

Biology
1 answer:
Sophie [7]3 years ago
8 0

crossing over is the exchange of two homologous chromosomes resulting in a mixture of parental characteristics in offspring while genetic variation is brought out through genetic mutations.

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What are the sequence of events in the replication of DNA
Oliga [24]

Answer:

There are three main steps to DNA replication: initiation, elongation, and termination. In order to fit within a cell's nucleus, DNA is packed into tightly coiled structures called chromatin, which loosens prior to replication, allowing the cell replication machinery to access the DNA strands.

3 0
3 years ago
Which compound plays a pivotal role in both the first and last step of the TCA cycle? a. pyruvate b. oxaloacetate c. oxalate d.
vitfil [10]

Answer:

Option b oxaloacetate is the right one.

Explanation:

There are major eight steps in TCA cycle. Oxaloacetate plays a pivotal role in <u>first and eight step</u>s of cycle.

Step 1. In the first step of the citric acid cycle, acetyl CoA joins with a four-carbon molecule, oxaloacetate, releasing the CoA group and forming a six-carbon molecule called citrate.

Step 8. In the last step of the citric acid cycle, oxaloacetate—the starting four-carbon compound-is regenerated by oxidation of malate. Another molecule of NAD+ is reduced to NADH in the process.

8 0
3 years ago
The structure most responsible for maintaining cell homeostasis is the
Annette [7]

Answer:

The answer is mitochondrion.

6 0
3 years ago
There are three checkpoints in the cell cycle what is the role.
Tanzania [10]

The 3 checkpoints include G1 where the cell growth is checked, G2 where the integrity of the DNA/chromosome is checked, and M where the integrity of the metaphase plate is checked.

<h3>Cell cycle checkpoints</h3>

There are 3 regulatory checkpoints in the life cycle of cells:

  • G1: the size of the cell, the presence of growth factors, and the integrity of the DNA are checked before the cell irreversibly commits to division.
  • G2: the integrity of the DNA and the correctness of the replication process at the S-phase are checked.
  • M: correct attachment of the spindle fibers to the chromosomes at the metaphase plate is checked.

More on cell cycle checkpoints can be found here: brainly.com/question/2128300

6 0
2 years ago
Kussmaul respirations are an indication that the body is
Tanzania [10]

Answer:

Kussmaul respirations indicates the condition of acidosis and diabtetes  ketoacidosis

Explanation:

Kussmaul respiration refers to the labored and deep breathing pattern. Adolph kussmaul introduced the term Kussmaul respiration.

This respiration refers to the form of hyperventilation in which the amount of carbon dioxide is decreased in the blood. The metabolic acidosis alters the normal pattern of breathing and results in rapid and shallow breathing. The Kussmaul respiration is most common in ketoacidosis.

6 0
3 years ago
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