how does the dna in the offspring produced by these methods compare to the dna in the original organism

Biology

1 answer:

egoroff_w [7]2 years ago

5 0

Very carefully (i'm sorry but there is not enough information provided)

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Speciation is the process by which new species are formed. Which of the following circumstances is most likely to lead to specia

trapecia [35]

Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.

When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.

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3 years ago

You are studying two traits in fruit flies:eye color where there are two colors, brown and redwing shape where there are straigh

Irina18 [472]

Answer:

e. Red segregated from brown in meiosis I, and straight segregated from curled in meiosis I.

Explanation:

A cross between two flies heterozygous for both genes produced an offspring with the phenotypic ratio of 9:3:3:1. This ratio is expected according to Mendel's law of independent assortment, which states that alleles of the same gene assort independently during gamete formation.

Before meiosis starts in flies, a single diploid cell duplicates its DNA, so each chromosome has 2 sister chromatids that contain the same information.

During meiosis I, the homologous chromosomes separate into two daughter cells. The chromosome number is reduced by half, but each chromosome has two sister chromatids.
During meiosis II, the sister chromatids separate and each daughter cell from meiosis I divides into two new daughter cells (to get the total of 4 haploid cells).

In a heterozygous fly, each homologous chromosome contains a different allele, and the sister chromatids are copies that carry the same allele. For that reason, both traits were segregated during meiosis I.

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2 years ago

The most basic definition of cellular respiration is that it is cells breaking down food to make energy. True or false?

fredd [130]

Answer:

True

Explanation:

In cells, energy is obtained from food through the process of cellular respiration. In mitochondria, this occurs through aerobic respiration- here, cells breakdown sugars like glucose into carbon dioxide and water and energy in the form of ATP or adenosine triphosphate.

In cellular aerobic respiration:

C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≅38 ATP