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3 years ago

1. Write Tor F beside each of the

Biology

1 answer:

aleksley [76]3 years ago

7 0

Answer:

A. The earth orbiting the moon (false)

B. Earth revolving around the sun (true)

C. The sun revolving around the earth (false)

D. The moon orbiting the earth (true)

E. The moon revolving around the earth (true)

F. The earth orbiting the sun (true)

<h3>sorry if I'm wrong anyways</h3>

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Consider the genetic cross for blood type of these two parents. The father is type A and the mother is type B. Both have the

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name some organs of the digestive system of an animal. How does the digestive system carry out a life process?

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<h3>I hope this helps!!</h3>

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2 years ago

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In Drosophila, the bar mutant is characterized by eyes that are restricted to a narrow, vertical bar. When a bar female is mated

Lelechka [254]

Answer:

See the answer below

Explanation:

a) The mode of inheritance of the bar mutant is X-linked and dominant.

Assuming that barness is represented by the allele B.

Bar female = $X^BX^B$ or $X^BX^b$

Wild type male = $X^bY$

Bar female x wild type male:

$X^BX^B$ x $X^bY$

$X^BX^b$ $X^BY$ $X^BX^b$ $X^BY$

All of the F1 flies are bar because a single B allele is required for the trait to be expressed.

Bar male x wildtype female

$X^BY$ x $X^bX^b$

$X^BX^b$ $X^BX^b$ $X^bY$ $X^bY$

All the female offspring are barred while all the males are wildtype barred resulting in a 50/50 (857/905 is approximately 50/50) ratio of barred/wildtype offspring.

b) Genotypes of each of the cross above, including the parents and the F1 generations.

1. $X^BX^B$ x $X^bY$

$X^BX^b$ $X^BY$ $X^BX^b$ $X^BY$

2. $X^BY$ x $X^bX^b$

$X^BX^b$ $X^BX^b$ $X^bY$ $X^bY$

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4 years ago