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Elden [556K]
1 year ago
14

Which event occurs once in meiosis?

Biology
1 answer:
Brrunno [24]1 year ago
3 0

Crossing over in germinal cells during gametogenesis is one of the primary causes of this variance. In humans, gametes are generated during meiosis, which reduces the chromosome number to 23.

One cell divides twice during meiosis to create four daughter cells. These four daughter cells are haploid, meaning they have half the amount of chromosomes as the parent cell. Meiosis generates sex cells or gametes? (eggs in females and sperm in males).

During meiosis, homologous chromosomes are paired, resulting in gene recombination.

Non-sister chromatids exchange genetic material, resulting in novel allele combinations.

Learn more about to meiosis visit here;

brainly.com/question/29383386

#SPJ4

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laiz [17]
This would be a recessive disease.

Father is dd
Mother is Dd (has to be because one child has the disease)

Parents cross is dd x Dd which gives rise to Dd (0.5) and dd (0.5). Each time they have a child they have a 50% chance of the child having the disease. In their case, only one of their 3 children is dd. The others though are carriers!
5 0
3 years ago
Which of the following have been linked to the dramatic global decline of amphibian populations? Select one: a. drainage of wetl
charle [14.2K]
<h2>The correct answer is: e.</h2>

Explanation:

  • Decline in the global population of amphibians is due to multiple reasons which include:
  1. A moist ecosystem is necessary for amphibians especially for the purpose of their reproduction. The drainage of the wetlands deprives them of their habitat.
  2. Pollutants adversely affects the survival of the gametes, tadpoles or the adult amphibians by acting as toxic agents and inhibiting their normal metabolic function.
  3. Infectious diseases often cause their death resulting their population to decline.
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7 0
3 years ago
Why crossing over is an important process for genetic variation
DerKrebs [107]

Answer:

so that the genetic variations are not directly exact

Explanation:

8 0
3 years ago
Which marine zone is rich in nutrients and contains a wide variety of organisms including coral reefs and kelp forests? a) Coast
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the answer is actually coral reefs

4 0
3 years ago
What’s is the unit ratio of platelets to whit blood cells in a microliter of blood?
____ [38]

Answer:

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Explanation:

Normally there are 4000 to 11000 WBCs in a microliter of blood averaging almost 7500. While there are 150,000 to 350,000 platelets in a microliter blood of a normal person averaging almost 250,000. Thus the ratio can be as 250,000 :7500 resulting in 33.3. If a range is to be given, it ranges from 31.8 to 37.5 per microliter of blood.

8 0
3 years ago
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