Question

sixty chromosomes are observed in the nucleus of a mammalian cell immediately after mitosis has occurred. fill in the number of chromosomes or chromosome pairs that will be found in other cells from the same organism. from the top down, what would your numbers be? 60, 30, 30 30, 60, 60 60, 30, 60 60, 30, 120

Explanation:

Step1: Determine chromosomes in somatic cells

After mitosis, daughter cells (somatic cells here) have same chromosome number as parent cell. Given 60 chromosomes after mitosis, so somatic cells have 60 chromosomes.

Step2: Determine chromosomes in gametes

Gametes are formed by meiosis. Meiosis halves chromosome number. So gametes have \(60\div2 = 30\) chromosomes.

Step3: Determine chromosome pairs in somatic cells

Chromosome pairs \(=\frac{\text{Total chromosomes}}{\text{2}}\). So \(\frac{60}{2}=30\) pairs.

Answer:

60, 30, 30