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3 years ago

Explain how mitotic recombination leads to the mosaic condition termed twin spots.

Biology

1 answer:

postnew [5]3 years ago

7 0

Answer:

If an individual Drosophila has two or more populations of cells comprising different genotypes from one single egg then it is termed as twin spots or mosaic.

Explanation:

There might be different reasons for mosaic to occur like

Nondisjunctioning of the chromosomes

Lag in anaphase

Endoreplication

Mutations in a single cell

Mitotic recombination:

One of the major ways through which mosaic or twin spots arise is the mitotic recombination. It is also termed as somatic cross over. Twin spot or mosaic generally occurs if there is linking of heterozygous genes in repulsion. The recombination generally happens among the centromeres from the adjacent genes.

A common example of the mitotic recombination is the Bloom's syndrome. Bloom's syndrome is caused due to the mutation that occurs in the <em>blm</em> gene. As a result, there are defects in the BLM protein produced.

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Answer:

Sodium chloride removes proteins from DNA and helps in DNA precipitation.

Explanation:

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Answer:

D. plants use carbon dioxide to make glucose/sugar

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3 years ago

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Answer:

It's "water in glaciers"

Explanation:

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4 years ago

Meiosis is associated with the _____.

NNADVOKAT [17]

Haploid number of chromosomes

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3 years ago

A person that is heterozygous type AB (AB) marries a person that is heterozygous type A (AO). What is the probability that their

BigorU [14]

Answer:

The correct option is <em>B. 25 %</em>

Explanation:

A heterozygous type can be described as the type in which both the alleles of a gene are different. If both the alleles of a gene are similar in an organism, then the person is said to be homozygous for the trait.

In the above question, two heterozygous parents are to be cross- bred to check the probability of them producing homozygous alleles (AA).

A punnet square made will show the following results:

A O

A AA AO

B BA BO

Hence, there will be 25% chance that the offspring produced could be homozygous AA.

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3 years ago