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3 years ago

A DNA segment is changed from AAT TAG AAA to ATT AGA AA. What type of mutation would this be?

Biology

1 answer:

natulia [17]3 years ago

6 0

Answer:

It would be deletion

Explanation:

a base was taken away (deleted) from the sequence; it is also called a frameshift mutation.

insertion, another frameshift mutation, would be a base added and substitution, a point mutation, would be one base replaced with another.

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3 years ago

After its formation, Earth was extremely hot. Which of these contributed to the cooling of Earth?

MariettaO [177]

Answer:

The answer is D

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3 years ago

Black fur (B) is dominant to white fur (b) in guinea pigs. An F1 cross was conducted and resulted in 100% heterozygous guinea pi

Lemur [1.5K]

Answer:

D. 1 BB : 2 Bb : 1 bb

Explanation:

This question involves a single gene coding for fur color in guinea pig. Black fur (B) is dominant over white fur (b). This means that, as stated in the question, if a black fur parent (BB) is crossed with a white fur parent (bb), a 100% heterozygous offspring (Bb) with black fur will result.

If two heterozygous guinea pigs are crossed i.e. Bb × Bb, the following gametes will be produced by each heterozygous parent:

Bb = B and b

Using these gametes in a punnet square (see attached image), offsprings with the following genotypic ratio will be produced:

1 BB : 2 Bb : 1 bb

BB and Bb = black fur guinea pigs

bb = white fur guinea pigs

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