Question

A chromosome that is exposed to a mutagen breaks into two pieces. A portion off one of the ends is removed before the two pieces rejoin. The mutation that occurs is

Answer 1

deletion

duplication

inversion

non-disjunction

Answer 2

do u understand the meaning of atleast one of them?

Answer 3

I know what inverse and duplication is.

Answer 4

Deletion---The loss or absence of a section from a nucleic acid molecule or chromosome.

Duplication---The action or process of copying something.

inversion ---A defect in the chromosome in which a segment of the chromosome breaks off and reinserted in the same place but in the reverse direction relative to the rest of the chromosome. Inversions are of two types: paracentric inversion and pericentric inversion.

Non-disjunction---(In mitosis) The failure of sister chromatids to separate during and after mitosis. (In meiosis) The failure of homologous chromosomes to segregate or to separate during and after meiosis.This could result to a condition wherein the daughter cells have an abnormal number of chromosomes; one cell having too many chromosomes while other cell having none.

Answer 5

So what's the answer

Answer 6

i gave u all the definition of each term

Answer 7

You shouldn't of even given them the definitions. That's what the biology textbook is for, and Wikipedia.

Answer 8

THE ANSWER IS SIMPLY DELETION.IT does not say anywhere about rejoining,so option A is right.