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n200080 [17]
3 years ago
14

Spiders are hermaphroditic. true or false

Biology
2 answers:
bonufazy [111]3 years ago
4 0
False spiders are most definitely not hermaphroditic.
qaws [65]3 years ago
3 0
False. Spiders expel sperm from genital opening, then they put it in secondary copuatory structures.
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how the cell structures (organelles) in this list can be used to classify the cell as either prokaryotic or eukaryotic
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An prokaryotic cell doesn’t have a nucleus

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If, after adding those channels, you were to wait long enough for the system to equilibrate (i.e., reach a stable state in which
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A young couple went to see a genetic counselor because each had a sibling affected with cystic fibrosis. (Cystic fibrosis is a r
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a) The correct answer is 1/2 or 0.5

Cystic fibrosis is a recessive disorder and her sibling has a disease but none of the parents had it. Thus, each of the parents must be the carrier of the disease, that is, both of them must be heterzygous.

So, if we cross Cc x Cc, it results in the genotype ratio of 1 (CC) : 2 (Cc) : 1 (cc)

Thus, 2 out of 4 would be the carrier of the disease.

b) 1/16

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Same is the case with male partner due to the probability that he would be the carrier is 1/2

If both are carrier then, there is only 1/4 chances that the offspring will have the disease (as per cross shown above).

Now, the probability that the offspring will have the disease = product of all the above probabilities. (The probability of occurrence of two independent events is equal to the product of their individual probabilities).

So, \frac{1}{2}x\frac{1}{2}x\frac{1}{4} = \frac{1}{16}

c) 1/8

The probability of female to be the carrier is 1/2

The probability male to be the carrier is 1/2

If both are carrier then, there is only 2/4 chances that the offspring will be the carrier of the disease (as per cross shown above).

Now, the probability that the offspring will be the carrier = product of all the above probabilities. (The probability of occurrence of two independent events is equal to the product of their individual probabilities).

\frac{1}{2}x\frac{1}{2}x\frac{2}{4} = \frac{1}{8}

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