The diploid number of the hypothetical animal Geneticus introductus is 2n = 36. Each diploid nucleus contains 3 ng of DNA in G₁.

Complete the following table by entering the number of chromosomes and amount of DNA present per cell at the end of each stage listed.

End of Cell Cycle      Number of             Amount of
Stage                        Chromosomes       DNA        _
Telophase I
Mitotic telophase
Telophase II

Key Concepts

Diploid and Haploid Cells

Diploid cells contain two complete sets of chromosomes, one from each parent, denoted as 2n. In the case of Geneticus introductus, the diploid number is 36, meaning there are 36 chromosomes in somatic cells. During meiosis, diploid cells undergo division to produce haploid cells (n), which contain only one set of chromosomes, essential for sexual reproduction.

Cell Cycle Stages

The cell cycle consists of several stages, including interphase and mitotic phases. Key stages relevant to the question are telophase I and II, which occur during meiosis, and mitotic telophase, which is part of mitosis. Each stage has distinct characteristics regarding chromosome number and DNA content, influencing how cells prepare for division and genetic variation.

DNA Content and Replication

DNA content refers to the amount of genetic material present in a cell, typically measured in nanograms (ng). In G₁ phase, Geneticus introductus has 3 ng of DNA per diploid cell. During the cell cycle, DNA replication occurs during the S phase, doubling the DNA content before cell division, which is crucial for ensuring that daughter cells receive the correct genetic information.