Meiosis

Meiosis

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. During reproduction, when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring.

Multiple Select

Which of the below are the outcomes of MITOSIS? select all that apply.

• Genetically identical cells

• 2 cells

• Diploid chromosomes

Multiple Choice

Which label 1-3 represents chromatin?

• 1

• 2

• 3

Multiple Select

Which of the below is the correct description of a gene?

• Loose form of DNA

• A portion of DNA that is inherited from parents.

• A version of a trait

Fill in the Blank

This is a pair of ___________ chromosomes, each chromosome came from a different parent.

Multiple Choice

If an organism had 12 chromosomes in its skin cells, how many chromosomes could be found in its sex cells?

• 12

• 0

• 6

• 24

Fill in the Blank

If 2n represents the number of diploid chromosomes in a non-sex cell, then haploid would be represented as _.

Multiple Choice

Crossing over in Prophase I allows gametes to _______.

• become haploid

• move to opposite ends of the cell

• move during fertilization

• become genetically unique

Fill in the Blank

At the end of meiosis I, _ genetically unique daughter cells are produced.

Multiple Select

By the end of meiosis, which of the below events occurred? Select all that apply.

• Cytokinesis

• Chromosomes uncoil

• Chromatids seperate

• Nuclear membrane reforms

Multiple Choice

Which graph represents mitosis?

• A

• B

Multiple Choice

Which graph represents meiosis?

• A

• B

Multiple Choice

Which labels represents s phase of interphase?

• i

• ii

• iv

• 2

• 5

Multiple Choice

Which label represents the second round of cell division in meiosis?

• 1

• 2

• 3

• 4

• 5

5.4.8 Explain the three possible processes (crossing over, law of segregation, law of independent assortment) that provide genetic variation 

• Alleles segregate randomly into gametes

• Alleles of two (or more) different genes get sorted into gametes independently of one another.

Multiple Select

Which of the below increases genetic diversity in organisms? Select all that apply.

• Genetic mutation

• Crossing over

• Law of segregation

• Law of independent assortment

Multiple Choice

Which genes are more likely to be inherited together?

• More closely linked genes

• Less closely linked genes

How to create a chromosome map from crossing over frequencies

• Start with the genes that are the farthest apart first, then go down stepwise.

• Solve it like a puzzle, using a pencil to determine the positions of the other genes

• Subtraction will be necessary to determine the final distances between each gene

Multiple Choice

Use the information in the image to select the correct order of genes on the X chromosome starting with gene C.

• C-W-S-B

• C-S-W-B

• C-B-S-W

• C-W-B-S

Multiple Choice

Use the information in the image to select the correct order of genes starting with Q.

• Q-R-P-S

• Q-P-R-S

• Q-S-R-P

• Q-S-P-R

Multiple Choice

Use the crossing over frequencies shown in the table, construct a chromosome map of these genes found all on a chromosome starting with A.

• A-D-B-C

• A-B-D-C

• A-C-B-D

• A-B-C-D