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saveliy_v [14]
3 years ago
5

Which of the statements best describes the process of crossing over during meiosis? Haploid daughter cells trade chromosomes in

pairs. Homologous chromosomes pair up and exchange segments of DNA. Chromosomes trade genes with other nearby chromosomes at random. Pairs of homologous chromosomes separate and move to opposite sides of the cell.
Biology
1 answer:
Maslowich3 years ago
5 0

Homologous chromosomes pair up and exchange segments of DNA.

Option A

<h3><u>Explanation:</u></h3>

Crossing over is an event of Prophase 1 of meiosis 1. It occurs in the zygotene phase of prophase 1. Here the homologous chromosome pairs get very close together and gets packed within protein coat. The enzymes randomly cut the DNA segments from both chromosomes at same loci and exchange them with each other. This results in the exchange of genes between the two chromosomes. This is how the variation comes to place between offsprings of the same individuals. The crossing over results to form X shaped intersections between homologous pair of chromosomes which is called as chaismata. This phase occurs in pachytene phase and is visible in diplotene phase when the protein coat dissolves.

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Finches that live in an isolated area with limited access to seeds and water is an example of what mechanism in Darwin's theory
Brums [2.3K]

Answer:

c. Limits on population growth

Explanation:

Darwin was heavily influenced by Malthusian theory of how population growth was influenced by growth limits. For Darwin, the population growth of species of living beings would be influenced by the limits imposed by the environment in which these species live, through the amounts of natural resources available to the population.

Thus, Darwin concludes that when the environment allowed an abundance of natural resources, such as water and food, the population of living beings would tend to grow more, however, when natural resources are limited, the population would grow less. This is called "population growth limits".

An example of this can be seen in the question above, where finches that live in an isolated area have limited access to seeds and water.

4 0
3 years ago
Can someone help me with this? My teacher just gives us papers to full out and doesn't teach at all.
Elden [556K]

Ribosomes - Make protein

Golgi Apparatus - Make, process, and package proteins

Nucleus - Stores the DNA and coordinates the cell's activities

Mitochondria - Make energy out of food

Vacuole - Storage for food and water

Lysosome - Contains digestive enzymes that help break down food


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I hope this helps :)

8 0
3 years ago
Which of the following groups of organs all remove metabolic wastes from the human body?
devlian [24]

Answer:

the correct answer is D

Explanation:

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4 0
3 years ago
Two things that Mitosis and Meiosis have in common
shutvik [7]

Answer:

Both mitosis and meiosis are multistage processes. The stages are interphase, prophase, metaphase, anaphase and telophase. The same general processes occur in each of these stages for mitosis and meiosis. Interphase is cell growth and DNA replication in preparation for cell division.

Explanation:

6 0
3 years ago
During dehydration synthesis is 42 water molecules were made how many monosaccharides were joined together to make the complex c
netineya [11]

Answer:

43 monosaccharides will be joined together to make the complex carbohydrate.

Explanation:

The complex carbohydrates are synthesized by the joining of monosaccharide residues by glycosidic linkages.One glycosidic linkage joins two monosaccharide residues by the elimination of one molecule of water.

  In other words it can be said that elimination of one water molecule joins two monosaccharides.By the same way elimination of 42 molecules of water will result in the joining of 43 monosaccaride residues.

3 0
3 years ago
Read 2 more answers
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