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3 years ago

Recombination occurs during _____.

Biology

2 answers:

slavikrds [6]3 years ago

8 0

Answer:

The correct answer would be meiosis.

During meiosis, recombination takes place in the form of crossing over.

It is an event that takes place during the pachytene stage of prophase I of meiosis I.

During this event, the genetic material gets exchanged between non-sister chromatids of homologous chromosomes.

It results in the production of new combinations of genes which are not present in either parent and thus, results in the genetic variation in a population.

Oksi-84 [34.3K]3 years ago

5 0

I believe the answer would be meiosis

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Decaying uranium atoms in Earth’s crust result in _____.

snow_tiger [21]

Decaying uranium atoms in the earth's crust result in Radon gas. Radon gas cannot be synthetically or commercially produced. It is produced as the result of the natural breakdown of uranium i.e. decaying uranium atoms. Radon gas is a naturally occurring radioactive gas. People are exposed to Radon gas via the inhalation and ingestion of the gas. Because it is found in the ground, water or building materials, Radon gas can enter work buildings as well as private dwellings.

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3 years ago

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Pepsi [2]

The right answer is D (less responsive to antigens)

It is proven that, after puberty, thymus activity (an organ that is included in the lymphatic system, producing T cells that pick up antigens) decreases and that in adult and aged people the thymus has no role. Work done in humans indicate that in fact the cellularity begins to decline from birth in favor of lymphocyte perivascular spaces and connective and adipose tissue, which leads to a decrease in the capture of antigens.

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3 years ago

Inetertia is the tendency of an object to resist motion?

Mademuasel [1]

Answer: Yes

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3 years ago

Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide and "a" is a recessive gene for the inability to tas

dexar [7]

Complete question:

Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide and "a" is a recessive gene for the inability to taste it. Which couples could possibly have both a child who tastes it and a child who does not?

a. father AA, mother aa

b. father Aa, mother AA

c. father Aa, mother Aa

d. father AA, mother AA

Answer:

c. father Aa, mother Aa

Explanation:

According to the given information, the ability to taste phenylthiocarbamide is a dominant trait and is imparted by the allele "A". This phenotype would be expressed in both homozygous and heterozygous conditions. The non-taster phenotype would be expressed in the homozygous recessive genotypes only.

To have both taster and non-taster children, both the parents should have at least one copy of the recessive allele. Among the given options, the father with genotype Aa and the mother with genotype Aa have the possibility to have both taster and non-taster children.

Aa x Aa= 3/4 taster (1/4 AA and 1/2 Aa): 1/4 non-taster (1/4 aa)

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3 years ago