Question

question 1
if a human cell has more or less than the correct number of chromosomes, what is a likely result? select all that apply.
□ a it can result in humans not being able to reproduce
□ b it can cause mutations in the dna of the human.
□ c it can cause the humans dna to replicate.
□ d it can result in lower human diversity.
□ e it can cause cell cloning in humans.

question 2
identify the following steps in the order shown (a, b, c, d) - which is not necessarily the correct sequence in the cell cycle
□ a anaphase, telophase, interphase, metaphase
□ b metaphase, interphase, cytokinesis, prophase
□ c metaphase, prophase, telophase, anaphase
□ d prophase, telophase, anaphase, metaphase

Explanation:

Question 1

• Option a: Abnormal chromosome number (e.g., in gametes) can lead to infertility. For example, in cases of severe aneuploidy in germ - line cells.
• Option b: Chromosomal abnormalities (like deletions, duplications which are forms of aneuploidy - related changes at the chromosomal level) can cause mutations in the DNA. For instance, a deletion on a chromosome can remove a gene or part of a gene.
• Option c: DNA replication is a normal process in the cell cycle (S - phase) and is not directly caused by having an abnormal chromosome number.
• Option d: Lower human diversity would be more related to lack of genetic recombination (like in asexual reproduction) rather than just an abnormal chromosome number in a single cell. Most cells with abnormal chromosome numbers (especially in somatic cells) are either eliminated (apoptosis) or do not contribute to the germ - line (where genetic diversity is mainly generated).
• Option e: Cell cloning (in the context of natural human biology) is not a result of having an abnormal chromosome number. Cloning (like in therapeutic or reproductive cloning) is a technological/experimental process.

The correct order of mitosis is prophase (chromosomes condense, nuclear envelope breaks down), metaphase (chromosomes align at the equator), anaphase (sister chromatids separate), telophase (nuclear envelopes reform).

• Option a: The order anaphase, telophase, interphase, metaphase is incorrect. Interphase (where the cell grows and replicates DNA) should come before mitosis (which includes prophase, metaphase, anaphase, telophase).
• Option b: Metaphase, interphase, cytokinesis, prophase is incorrect. Interphase should be before mitosis (prophase is the first stage of mitosis), and cytokinesis is the last step (after telophase) in cell division.
• Option c: Metaphase, prophase, telophase, anaphase is incorrect. Prophase should come before metaphase.
• Option d: Prophase, telophase, anaphase, metaphase is incorrect. The correct order after prophase is metaphase, then anaphase, then telophase.

Answer:

A. It can result in humans not being able to reproduce, B. It can cause mutations in the DNA of the human

Question 2