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elixir [45]
3 years ago
11

Which is needed before meiosis can begin? Group of answer choices DNA replication aneuploidy corpus luteum recombination

Biology
1 answer:
Svetlanka [38]3 years ago
5 0

Answer:

DNA replication

Explanation:

For the most part of a cell's cycle, each chromosome has only one chromatid.

Before entering meiosis, a diploid cell (which contains a set of chromosomes from one parent and another set from the other parent) first doubles its DNA, and the cell will start division with each chromosome having 2 sister chromatids.

During meiosis I homologous chromosomes (the maternal and paternal sets) separate, and during meiosis II the sister chromatids separate. As a result, 4 daughter cells with half the original diploid chromosome number and one chromatid per chromosome are produced.

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Name two types of evidence used to support the theory of evolution. explain how scientist use each type of evidence to provide s
joja [24]

Answer:

There are many types of evidence which support the theory of evolution such as comparative anatomy, fossil records, phylogenetic relationship, embryology et cetera

Comparative anatomy includes homologous organs and analogous organs. They support divergent and convergent evolution respectively.  

For example, the homologous structure of limb of humans, birds, bat, horse, whale et cetera show that they are made up of the same set of bones which are humerus, radius, ulna, carpals, metacarpals, and phalanges.  

It shows divergent evolution and supports that these organisms have evolved from a common ancestor.

Embryological evidence: When early stages of embryological development of different organisms are compared, it is found that these stages are similar at different levels of development.

For example:

  • The appearance of pharyngeal-arch (gill-like structures) in vertebrates during embryo development.
  • Salamanders and terrestrial frogs pass through larval stages within an egg. They possess the features similar to aquatic larvae, however, when they hatched out the eggs being ready for life on land.
3 0
3 years ago
Read 2 more answers
Suppose that leg length in the Halkan pogo-bouncer, a common insect on the planet Terran02, is determined by five loci, A, B, C,
Sergeu [11.5K]

Answer:

40mm

Explanation:

each AABBCCDDEE = 55

each will contribute 55/5 = 11

thus, AaBBCcDDEe will be 5.5 + 11 + 5.5 +11 + 5.5 = 38.5, approx. 40mm

4 0
3 years ago
If two different animal species are found to go through equivalent stages of embryonic development until the very last stage, wh
AleksandrR [38]
The answer is <span>A. The two animal species are very closely related.

If the two animal species are very closely related, that means their genome information is very similar and that information for embryonic development is also very similar, but it will not be identical. Stages of embryonic development from the beginning to the end are same only in the same species. In different species, they will differ in lesser or greater extent which depend on how closely this different species are related.</span>
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Question 3 of 10
Romashka-Z-Leto [24]
C: conducting an experiment
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What have a jellylike material found throughout cell?
rosijanka [135]
The answer is a hope it helped

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3 years ago
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