All categories

3 years ago

Drosophila melanogaster have four pairs of chromosomes.

Biology

1 answer:

vlada-n [284]3 years ago

5 0

The answer is d. 2n

Drosophila melanogaster have four pairs of chromosomes, so the normal cell would have 4n(four pairs) of chromosome. metaphase is the phase of cell division where the chromosome start to lining up in the middle. In meiosis II, the chromosome is already divided into half, so the total chromosome of the cell would be 2n(half of the 4n)

You might be interested in

Which of the following best explains the factors that led to the dust bowl?

faltersainse [42]

Answer;

C. Poor farming techniques that killed the soil were combined with drought.

Explanation;

-The Dust Bowl was caused by several economic and agricultural factors, including federal land policies, changes in regional weather, farm economics and other cultural factors.

-After the Civil War, a series of federal land acts coaxed pioneers westward by incentivizing farming in the Great Plains.

3 0

3 years ago

Read 2 more answers

In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds), while aa plants have yellow ke

lara31 [8.8K]

Answer:

Explanation:

As given,

Allele A for blue anthocynin.

aa for yellow kernel;

at second locus;

W produce smooth kernel,

ww for wrinkled kernel;

Parents as given are: AaWw and aaww

Progeny are:

blue smooth ( AaWw)= 1447;

blue wrinkle (Aaww)= 169;

yellow smooth (aaWw)= 186;

yellow wirnked (aaww)= 1510

Recombinant progeny are 169+ 186= 355

non- recombinant progeny are = 1447+ 1510= 2957

so recombination frequency (RF)= 346/2957×100= 12.0054%

So a and w are linked genes.

They are 12 mu far away from each other.

b) Blue smooth parent= AaWw.

c) Aaww crossed with aaWw

progeny are= AaWw, Aaww, aaWw, aaww,

They all are produced in same proportion =0.25% or 1/4.

5 0

3 years ago

How might cancer stem cells originate ?

OLga [1]

This figure illustrates 3 hypotheses of how a cancer stem cell may arise: (1) A stem cell undergoes a mutation, (2) A progenitor cell undergoes two or more mutations, or (3) A fully differentiated cell undergoes several mutations that drive it back to a stem-like state.

8 0

3 years ago

What happens to the CO2 released by the body?

Sladkaya [172]

Answer:

When CO2 is breathed into the lungs, it dissolves in the water there, diffuses across the alveolar-capillary membrane, and enters the bloodstream. As it combines with water, it forms carbonic acid, making the blood acidic. So CO2 in the bloodstream lowers the blood pH.

8 0

3 years ago

Read 2 more answers

Where simple sugars are broken down into carbon dioxide, water vapor and atp ogranelle?

aleksklad [387]

Answer: Mitochondria

Explanation: Mitochondria is an organelle responsible for cellular respiration which is the break down of Simple sugars into carbon dioxide,water,ATP( adenosine trisphosphate).

It has a double membrane,known as the power House of the cells found in the cytoplasm of most Eukaryotic organisms.The number of Mitochondria found in an organism varies according to the Oxygen requirements of that organism. In human liver contains about 2000 Mitochondria,the Red blood cells do not contain Mitochondria.

8 0

3 years ago