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3 years ago

What are two parts of sexual reproduction that produce genetic variation

Biology

1 answer:

forsale [732]3 years ago

3 0

Answer:

Independent assortment of chromosomes
Crossing over

Explanation:

Independent assortment of chromosomes

We each have a diploid genome that is used to make haploid gametes. The selection of which combinations of chromosomes (and the particular alleles they hold) that are passed on to the gametes is random. I.e. 1 gamete could have the paternal chromosomes 1, 4, and 6, and maternal 2, 3 and 5. Another gamete could have paternal 2, 4, and 6, and maternal 3 2 and 5.

This produces unique combinations of alleles that are passed onto the next generation after sexual reproduction.

Crossing over

Crossing over occurs when homologous chromosomes pair up and align during meiosis. When this happens, they can exchange genetic material at homologous sites. This means that even within chromosomes, there are new combinations of alleles being created to pass on to the gametes before sexual reproduction. That is, each chromosome will have chunks of maternal and chunks of paternal DNA.

Both of these features increase genetic variation by two mechanisms, and this is occurring in two individuals, producing genetically diverse offspring.

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3 years ago

A stream or river that runs into another stream or river is called a

Maksim231197 [3]

Answer:

tributary

Explanation:

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2 years ago

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3 years ago

BEST ANSWER GETS BRAINLIEST!!!!!!!

Ganezh [65]

Answer:

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Explanation:

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3 years ago

You are studying an animal and inject fluorescein, a fluorescent dye, into a single cell on the surface epithelium of the animal

Viktor [21]

Answer:

The cells are connected by gap junctions.

Explanation:

A gathering of protein channels, which permits small molecules and ions to move between the neighboring cells is termed as a gap junction. The protein channels that form gap junctions comprise two connexons, of which one is situated in the membrane of one cell that combines and aligns with the connexon of the adjacent cell.

This association produces a spontaneous pathway, which permits the small molecules and ions to pass passively from one cell to another. The gap junctions are found in all the kinds of cells, however, they are not found in skeletal muscle, RBCs, and blood lymphocytes.

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3 years ago