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2 years ago

One trisomy found in humans, Down syndrome , results from___ during meiosis.

Biology

1 answer:

LiRa [457]2 years ago

5 0

Answer:

A, nondisjunction.

Nondisjunction is the failure in sister chromatids to separate properly during cell division.
i hope this helped at all.

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What is the importance of ATP and NADPH?

bulgar [2K]

Answer:

The energy that these molecules carry is stored in a bond that holds a single atom to the molecule. For ATP, it is a phosphate atom, and for NADPH, it is a hydrogen atom.

These electrons are used to produce NADPH as well as ATP in a series of reactions called the light reactions because they require light. NADPH and ATP formed by the action of light then reduce carbon dioxide and convert it into 3-phosphoglycerate by a series of reactions called the Calvin cycle or the dark reactions.

5 0

3 years ago

In corn, small pollen (sp) is recessive to normal pollen (sp+) and banded necrotic tissue, called zebra necrotic (zn), s ssive t

alex41 [277]

Answer:

Option B

Explanation:

Please see the attached image

Given -

Allele for small pollen is "sp"

Allele for normal pollen is "sp+"

and "sp+" is dominant over "sp"

Allele for zebra necrotic tissue is "zn"

Allele for normal necrotic tissue is "zn+"

and "zn+" is dominant over "zn"

Cross is carried out between

sp+ sp zn+ zn x sp+ sp zn+ zn

The gametes of the parent cells are -

sp+ zn+, sp+zn, spzn+, spzn

The cross would be as follows

sp+ zn+ sp+zn spzn+ spzn

sp+ zn+ sp+ sp+ zn+ zn+sp+ sp+ zn+ znsp+ sp zn+ zn+ sp+ spzn+ zn

sp+zn sp+ sp+ zn+ znsp+ sp+ zn znsp+ sp zn+ zn sp+ sp zn zn

spzn+ sp+ sp zn+ zn+sp+ sp zn+ znsp sp zn+ zn+ sp sp zn+ zn

spzn sp+ sp zn+ zn sp+ sp zn zn sp sp zn+ zn sp sp zn zn

Hence, option B is correct

7 0

3 years ago

BRAINLIESTTTT ASAP!!! PLEASE HELP ME :)

alexgriva [62]

A) A metal forms a + charged ion, so D2+

B) A nonmetal forms a - charged ion, so A-

C) C2-

D) B+

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3 years ago

Genes are long segments of DNA that code for ____________________

Rufina [12.5K]

Answer:

protein

Explanation:

a specific protein tht functions in one or more types of cells in the body.

8 0

3 years ago

Describe the role of cellular respiration in a plant???

Citrus2011 [14]

Answer:

The process of cellular respiration allows plants to break down glucose into ATP.

Explanation:

Although plants use photosynthesis to produce glucose, they use cellular respiration to release energy from the glucose.

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3 years ago