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kipiarov [429]
2 years ago
6

Intracranial tumors that originate directly in brain tissue are called primary intracranial tumors. True False

Biology
2 answers:
galina1969 [7]2 years ago
4 0

Answer:True

Explanation:

Primary brain tumors includes tumors that originate from the tissue of the brain or the brain's immediate surroundings.

Whereas metastatic brain tumors are those tumors which arise elsewhere in the body such as breast or lungs,and migrate towards brain(usually via bloodstream)

nika2105 [10]2 years ago
3 0
This statement is true
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Answer:

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Explanation:

For X-linked recessive inheritance, a female (XX) needs two recessive alleles to be affected while a male needs only one (XY). It is hypothetically assumed that the Y chromosome does not carry any trait.

Assuming the allele for the disease is represented by g, a woman whose father suffered from G6PD is a carrier for the disease with genotype X^GX^g. A normal man will have the genotype X^GY. When the 2 marries:

X^GX^g   x   X^GY = X^GX^G (normal female), X^GY (normal male), X^GX^g (carrier female), X^gY (affected male)It thus means that 50% or 1/2 of their sons will be expected to have G6PD.

Now, assuming the husband has G6PD, the mating becomes:

X^GX^g   x   X^gY = X^GX^g (carrier female), X^GY (normal male),  X^gX^g (affected female), X^gY (affected male)50% or 1/2 of their sons is still expected to have G6PD. The ratio remains unchanged.

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2 years ago
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