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Lemur [1.5K]
2 years ago
13

18. During meiosis, homologous chromosomes exchange genetic material. This exchange of

Biology
1 answer:
bija089 [108]2 years ago
8 0

A. increases the genetic variation

that's why individuals don't look like their partents. This process is called crossing-over

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William and Quentin are fraternal twins. This means they share, on average, what % of genes with one another?
nordsb [41]

Answer:

The correct answer is 50%

Explanation:

Fraternal twins are the twins which are produced from the fertilization of two different eggs by two different sperms. These eggs are released at the same time.

So as fraternal twins are produced from fertilization of two different eggs therefore they share 50% of genes with each other just like other siblings. They are also called dizygotic twins

Identical twins are produce from a sigle fertilized cell which later divides into two cell mass. Indentical twins share 100% gene. Therefore the correct answer is 50%.

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3 years ago
A model of cell division is shown here. A student evaluates the model and makes the claim that the cell division increases genet
loris [4]

Chromosomes exchange genetic material in step 3.

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

The meiosis is the type of cell division that takes place for gametogenesis. The meiosis has two phases - meiosis I and meiosis II.

The meiosis I has the events like crossing over and independent assortment which leads to the mixing of genes between homologous chromosome pairs and separation of homologous chromosome pairs. So the two cells that are produced from the meiosis I are genetically different. The step 3 shows the crossing over of prophase 1 of meiosis I. So, it shows the genetic difference between the offsprings and leads to genetic variation.

5 0
3 years ago
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What information did you include in your
Arturiano [62]

Answer:

It contains all of the instructions a cell needs to sustain itself. These instructions are found within genes, which are sections of DNA made ... form that can be used by cells to produce the proteins needed to support life. ... In other cases, the RNA molecule carries messages from the DNA to other parts of the cell for processing.

Explanation:

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Explanation:

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