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horrorfan [7]
3 years ago
13

Can the Lyon hypothesis be tested in a human female who is homozygous for one allele of the X-linked G6PD gene? Why, or why not?

Biology
1 answer:
saw5 [17]3 years ago
6 0

Answer:

No, Presence of different alleles for an X-linked gene is required to test the Lyon hypothesis.

Explanation:

According to the Lyon hypothesis, to compensate the dosage of X linked genes in males and females of mammals, one X chromosome in all the cells of a female mammal is inactivated and the presence of the gene on the other X chromosome is expressed.

Inactivation of the X chromosome is a random process, that is, either maternal or paternal X chromosome may be inactivated during early embryological development in females.

To test the Lyon hypothesis, the expression of alternative alleles of an X-linked gene in the cells of a female mammal is studied. Given that the human female is homozygous for an X-linked gene, all of her cells would express the same allele for the gene, and the Lyon hypothesis can not be tested.

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Memory and thinking are most closely associated with which part of the central nervous system?
fredd [130]

Answer:

Cerebrum

Explanation:

Memory is a complex process and the stored memory is the past experience of the human being. They are formed by thinking and different events done by the human.  

The cerebrum of the brain involves thinking and memory. This is the largest part of the brain having different sub-parts. They are especially the hippocampus, temporal lobe, limbic system which involves different types of memory.

Cerebrum involves in hearing, speech, movement control, learning.

The limbic system is part of the cerebral cortex. It is concerned with emotion, behavior,  memory.

The long term memory is dealt with by the hippocampus. This type of memory gets active when a person wants to recall something or memorize a thing for a long time.

The temporal lobe involves listening to a sound and store some short term memory. Other lobes of cerebrum involve sensory memory like vision, taste, smell, etc.

8 0
3 years ago
A man is 1.7 m long. A paramecium is 85 µm long. How does the length of the man compare to the length of the paramecium?
NISA [10]

Answer is C. The man is twenty thousand (2 x 10⁴) times larger than the paramecium.

1 meter (m) = 10⁶ micrometers (µm)

Therefore, 1.7 m = 1.7 × 10⁶ µm

Thus, the length of the man compared to the length of the paramecium will be

1.7 × 10⁶ / 85 = 2× 10⁴ .  

Therefore, length of the man is  2× 10⁴ times larger than the length of the paramecium.

8 0
4 years ago
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stealth61 [152]
The answer you are looking for is right here, Gogli Apparatus is the answer


3 0
4 years ago
Which biome is the world's largest and contains mostly coniferous trees?
wel

Answer:

B. deciduous forest

Explanation:

Hope this helps!!!

Forever friend and helper,

Cammie:)

4 0
3 years ago
What stage does cytokinesis generally overlap with in the typical cell cycle?
gizmo_the_mogwai [7]
Cytokinesis generally overlap with the typical cell cycle in the telophase stage. Telophase is the last stage of mitosis; where the sister chromatids reach opposite poles. Telophase and cytokinesis occur simultaneously, during cytokinesis the cell splits in two once the DNA has been replicated and pulled to opposite ends of the cell. 
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3 years ago
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