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sergeinik [125]
3 years ago
8

If a cell has 40 chromosomes, how many centromeres would it have when it is in metaphase? a. 1 b. 2 c. 20 d. 40 e. 80

Biology
1 answer:
Alla [95]3 years ago
8 0

Answer:

Basically this depends on the type of cell division the cell undergoes.

if the cell undergoes reduction division of meiosis(n) the  chromosome number will be reduced to 20 so the centromere will be 20, However if the cell undergoes multiplication division of mitosis,(2n) the centromere will be 40, since the chromosomes number will increases and sister chromatids holding the chromosomes are held at centro mere.

Explanation:

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Ne4ueva [31]

The part of the eye that prevent light from reflecting internally and is heavily vascularized to deliver blood to the retina: choroid.

<h3>What is choroid?</h3>

The choroid is highly vascularized to provide blood to the retina and contains dark pigmentation to stop light from reflecting inside. Anteriorly, the choroid, ciliary body, and iris are all joined.. The ciliary body muscles regulate the lens's thickness. The iris acts as a diaphragm, changing the pupil's aperture at its center. This regulates how much light is allowed to enter the retina. In strong light, the iris' muscle fibers constrict the pupil to accommodate close vision; in low light, they enlarge it to accommodate far vision. Each individual's iris is a different color.

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6 0
1 year ago
The Punnett square predicts a 9:3:3:1 ratio for phenotype. Explain what the ratio means.
Aleksandr-060686 [28]
This occurs in dihybrid crosses
There is a 9/16 chance of the offspring have all dominant traits
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6 0
3 years ago
Over millions of years, birds developed as a species. This relates to _____.
Tpy6a [65]
<span>Evolution of birds is result of a drastic change in how dinosaurs evolved. </span>
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larisa [96]

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Explanation:

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