3 years ago

In this case of trisomy 18, how many chromosomes would have been present in the first polar body?

1 answer:

3 0

Polar bodies serve to eliminate one half of the diploid chromosome set in meiotic division in the egg, leaving behind a haploid cell. That means that 23 pairs (46) of chromosomes are going to be separated equally, 23 for the polar body and 23 for the egg cell. In case of trisomy 18, the division is not equal. Instead, the egg cell receives 23 +1 chromosomes and the polar body receives 23 - 1= 22 chromosomes.

That chromosome that was misplaced is the chromosome 18.
<span />

You might be interested in

A population of fruit flies on an island lay their eggs in some rotting fruit. Some of the fruit is blown into the ocean by a st

ale4655 [162]

C they will adapt and eventually become a new species

3 0

4 years ago

Read 2 more answers

Human blood type is determined by multiple alleles (A, B, and O). Which ratio would result from a cross between a man with homoz

Mnenie [13.5K]

Hallo~~

Your question is related to genetics.

Have you ever done a Punnett Square? This question forces you to make one. If your cross a homozygous type A (AA) and homozygous type O (OO) you should get 100% AO. Understanding genetics, an AO gene means a type A blood. Therefore, it's 100% type A blood (AO).

4 0

4 years ago

Using the DNA diagram above, identify the molecule at position #1.

Anna007 [38]

Answer:

HHHMMM idk

Explanation:

6 0

3 years ago

What is the location of the stem where the leaf connects

adoni [48]

Nodes. Leaves are attached the plant stem at areas called nodes .

6 0

3 years ago

Describe the changes that occur in the male and female reproductive systems during puberty.

RoseWind [281]

During puberty the testes of the man will begin to produce testosterone. This causes hair growth in multiple areas of the body and the voice change. Similarly, women begin to grow hair but also begin menstruation.

4 0

3 years ago