Review the following dna sequences.
original dna sequence
a t t g c t a a g t c a
mutated dna sequence
a t t g a t a a g t c a
which type of mutation occurred?
insertion
deletion
there is no mutation.
substitution

The answer is substitution

Explanation:

Substitution is a kind of mutation that occurs when one nucleotide is change by a different one. In your example, only change the fifth nucleotide (C by A) so, this is an example of point mutation (onle one nucleotide changed).

The other options are differents kinds of mutations that the one shown in your question.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?