28. The model below shows what happens to chromosomes during a certain part of the cell cycle. Why is this step in the cell cycle important for maintaining a functioning organism?
1 chromosome
1 chromosome
(before mitosis)
(after replication)
centromere
1 chromatid
per chromosome
2 chromatids
per chromosome
a. Each cell needs a complete set of organelles in order for the cell to work properly
b. Copying the DNA provides more instructions so the cell can work more efficiently
C. Each cell needs to receive a complete copy of the chromosomes in order for the cell to work
properly
yes

C. Each cell needs to receive a complete copy of the chromosomes in order for the cell to work properly

Explanation:

The model in this question depicts the process of DNA replication, which is the process whereby an identical copy of DNA is made. Based on the model in the question, one (1) individual chromosome forms two (2) sister chromatids per chromosome. Each sister chromatid contains the replicated DNA.

This process is very important and must occur prior to any cell division because every cell needs to receive a complete copy of the chromosomes in order for the cell to work properly. For example, each human cell must receive 23 pairs of chromosome or 46 chromosomes in order to function well and this is ensured by DNA replication.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

links? do you have a link? i don't see anything?