What is crossing over and why is it important?

Crossing over or Chromosomal crossover is the process that occurs in cells between the stages of phrophase  I and metaphase I in meiosis. It is important because it is responsible in the exchange of genetic material between homologous chromosomes during sexual reproduction. This process ensures the normal segregation of chromosomes during meiosis, and genetic variation. Homologous chromosomes pair up with each other and exchanges segments of their genetic material to form new chromosomes. Thomas Hunt Morgan described crossing over in his theory of genetics. 

Answer:

9.9 years

step-by-step explanation:

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

Um can u take a picture of the work