What can we observe in order to visualize Mendel's Law of Segregation?

• homologous chromosomes separating during meiosis I
• sister chromatids separating during mitosis
• the replication of DNA
• homologous chromosomes separating during meiois II

homologous chromosomes separating during meiosis I

A white-eyed female Drosophila is crossed with a red-eyed male Drosophila. Which statement below correctly describes the results?

• Fifty percent of the females will have red eyes.
• None of the females will have red eyes.
• None of the females will have white eyes.
• Twenty-five percent of the females will have white eyes.

None of the females will have white eyes.

In humans, the chromosome contribution from both parents determines sex because the offspring uses all the parents' chromosomes.

• True
• False

False

Aneuploidy results in a situation in which the chromosome number is either 2n+1 or 2n-1.

• True
• False

True

In general, the frequency with which crossing over occurs between two linked genes depends on what?

• the characters the genes code for
• whether the genes are dominant or recessive
• how far apart they are on the chromosome
• whether the genes are on the X or some other chromosome

how far apart they are on the chromosome