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PLEASE HELP IF YOU CAN THERE BIOLOGY MITOSIS QUESTIONS

1. Why do you think that cells duplicate their chromosomes before dividing instead of after? They'd end up with the same amount either way.
a) It's just a random result of evolution.
b ) It's more efficient because the parent cell has more material to work with.
c) The daughter cells would each lose one-half of the genetic information
otherwise.
d) The daughter cells have no way to duplicate the chromosomes.


2. If a cell lost half of its genes during each division, it would eventually have just one gene left. If it starts with 16 genes, how many divisions would it take before just one
was left? Note: The bacterium E. Coli has about 3,000 genes.
a) 2 b) 4 c) 16

Sagot :

Oseni

1) Cells duplicate their chromosomes before dividing instead of after because the daughter cells would each lose one-half of the genetic information.

The duplication of chromosomes automatically leads to the duplication of the genetic information on the chromosomes and each daughter cell receives a copy each of the genetic information.

If the information are not duplicated before dividing, it means that each daughter cell will receive half information.

2) If a cell that starts with 16 chromosomes lost half of its genes during each cell division, it will take 4 divisions for the gene to remain 1.

  • First division, the genes would remain 8 from 16
  • Second division, the genes would remain 4
  • Third division, the genes would remain 2
  • Fourth division, the gene would remain only 1.

More on cell division can be found here: https://brainly.com/question/24276929

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