Meiosis

What is it called when a sperm and egg meet?

• meiosis
• fertilization
• cell division
• mitosis

Which letter(s) in the diagram correspond to cells that are haploid? 

• A
• B
• C
• A and B

What causes genetic variation in meiosis?

• chromosomes lining up
• crossing over of chromosomes
• separation of chromosomes
• chromosomes pulling apart

What is one of the advantages, why is it better to reproduce sexually versus asexually?

• survival of the fittest
• overproduction
• genetic variation
• cloning

A human zygote should have _____ chromosomes inside.

• 46
• 23
• 92
• 64

What do experts say is the most common form of Down Syndrome?

• Trisomy 47
• Trisomy 46
• Trisomy 21
• Trisomy 23

What phase is  shown in the picture?

• anaphase 1
• anaphase 2
• metaphase 1
• telophase 1

The process of crossing over occurs in what phase of meiosis?

• anaphase 1
• prophase 1
• prophase 2
• telophase 1

This image shows chromosomes during Prophase 1. Which of the following correctly describes the process shown?

• segregation of sister chromatids
• condensation and segregation of alleles
• mutationin which the DNA content of the gene is altered
• crossing - over in which alleles are exchanged

What phase is shown here?

• Prophase II
• Metaphase I
• Metaphase II
• Anaphase I