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ki77a [65]
3 years ago
15

Vwhich process occurs when chromosomes do not separate during meiosis?

Biology
2 answers:
AleksandrR [38]3 years ago
7 0

Answer:

The correct answer is Non-disjunction.

Explanation:

Non- disjunction is the failure of chromosomes to separate during the cell division. This can occur in both meiosis I, II and mitosis during their anaphase.

Non-disjunction of homologous chromosomes lead to "aneuploidy" that is the production of daughter cells with different amount of chromosome number like non-disjunction at meiosis I produce cells with trisomy (one extra chromosome) and monosomy (one less chromosome).

Thus, Non-disjunction is the correct answer.

Alexxandr [17]3 years ago
4 0
When chromosomes do not separate during meiosis is called nonjurisdiction.

Sometimes during anaphase, chromosomes will fail to separate properly.


 

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Mature human nerve cells and muscle cells are permanently in what state?
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In mitosis cytokinesis occurs once in meiosis is occurs twice.

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3 years ago
Refer to Infographic below. On the Galápagos Islands, the finches that Darwin studied tended to have either small beaks or large
adoni [48]

Answer:

Disruptive selection

Explanation:

According to the infographic that is attached below showing different the three main types of selection that occurs as a result of natural selection taking its course on any population, we can draw our conclusion regarding the information given to us from the question.

From the question above, it states that the finches studied by Darwin are majorly finches with either small beak or large beak which are all adapted to suit the type of food available for the finches in the islands. Whereas, finches with intermediate beaks are favored against.

According to the infographic, disruptive selection can be said to have taken place as extreme traits are favored against intermediate traits on the islands.

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2 years ago
The cell theory eventually replaced the concept of spontaneous generation as a result of what experimental evidence?
Arisa [49]

<u>Answer:-</u> <em>Option C </em>- evidence that microorganisms cannot grow in boiled broth when new organisms were not allowed to enter.

<u>Explanation:-</u>

  • <em>Theory of spontaneous generation</em> stated that the living organisms can be created from non living matter. However, this theory was disapproved and replaced by the <em>cell theory</em> which stated that all living organisms are created from cells and new cells arise from pre-existing cells.
  • There were several experiments conducted by various scientists to disapprove the theory of spontaneous generation however, the experiment that was most successful to do so was the one conducted by <em>Louis Pasteur</em> in 1859.
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-In his experiment, Pasteur boiled a meat broth in a flask (it was known that boiling the broth kills the micro organisms) and then heated the neck of the flask to bend into a S- shape.

The purpose of the S shaped neck was to allow the air to enter into the flask but not the micro-organisms as the micro organisms will settle by gravity in the neck and not reach into the flask.

<em>observations of the experiment</em> :-

1. Pasteur observed that even though the air entered the flask no micro organisms were growing in the flask.

2. Further,when he tilted the flask so that the broth came in contact with the part of the neck where the air borne microorganisms could have settled he was able to observe microbial growth in the flask.

These observations laid the theory of spontaneous generation to rest and proved that <em>organisms can only grow in the presence of pre-existing cells </em>which in this case were the microorganisms.  

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