Imagine that one side of a dna molecule has the following chemical base sequence: c-g-a-a-t which of the following represents a genetic mutation of the sequence? c-g-a-a-t or c-g-a-t-t

The correct option is C-G-A-T-T

Genetic mutation is permanent change in either of the two:

a) Single building block ( a unit base pair, A, G, C, T)

OR

b) Change in the Codon (triple base pair like AGG TCT etc.) or a large part of the chromosome.

In this question there is a change in single building block and thus, it is a genetic mutation.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.