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Georgia [21]
2 years ago
15

Which best describes alleles?

Biology
2 answers:
borishaifa [10]2 years ago
7 0
Answer: D
Explanation: alleles are usually dominant or recessive is the only correct answer in this case.
8090 [49]2 years ago
3 0

Answer:

D. they are usually dominant or recessive.

Explanation:

alleles are pairs of genes found on a particular spot a chromosome. If one is dominant over the other it give rise to a particular trait.

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The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the A) atrial systole. B) early d
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The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the systolic ejection phase (Option D). It is the second phase of the ventricular systole.

The cardiac cycle is a sequence of contraction and relaxation of the atria and ventricles to pump blood throughout the body.

This cycle (cardiac cycle) can be divided into two major periods: diastole and systole.

The diastole is when the heart relaxes and refills with blood, while the systole is when the heart contracts and pumps blood.

The systolic ejection phase is the second phase of the ventricular systole where blood is pumped from the ventricle.

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