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Meiosis

Meiosis

Assessment

Presentation

Biology

9th Grade

Easy

NGSS
HS-LS3-1, HS-LS3-2

Standards-aligned

Created by

Randy Carpenter

Used 15+ times

FREE Resource

8 Slides • 8 Questions

1

Meiosis

by Randy Carpenter

2

Important Terms

​Gametes

​Karyotype

​Homologous Chromosomes

​Haploid

​Diploid

​Spermatocyte

​Oocyte

​Synapsis

​Tetrads

3

​General Overview of Meiosis

4

​Meiosis

​Meiosis creates cells with half the DNA of a parent cell (Specifically, one set of chromosomes instead the usual 2 sets). These cells are called Gametes. Gametes are sex cells. Eggs (Oocyte) in women and sperm (Spermatocyte) in males.

​Meiosis shuffles these two sets of chromosomes like a deck of cards and then randomly deals them out into the gametes.

​Meiosis will create cells that are different from each other unlike mitosis, which aims to create identical cells.

5

Multiple Choice

What is a Gamete?

1

Male and female reproductive cells

2

Genetically identical cells

3

The product of mitosis

4

A somatic cell (regular body cell) that makes up the general structures of an organism

6

Multiple Choice

You will find an Oocyte in...

1

Men

2

Women

7

Multiple Choice

You will find a spermatocyte in....

1

Men

2

Women

8

​Karyotype

​A karyotype is a visual layout of all the pairs of chromosomes of a critter.

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9

Open Ended

You have 46 total chromosomes or 23 pairs/sets. Where do you think you get each pair from? (Be specific)

10

​Chromosome Pairs

​You get one set of chromosomes from your mom and one set of chromosomes from your dad.

​You get 1 number 1 chromosome from your dad and 1 number 1 chromosome from your mom.

​How do we know what chromosomes are number 1's instead of number 4's?

​Homologous Chromosomes

11

​Homologous Chromosomes

​These are chromosomes with an extremely similar size, centromere location, and gene loci.

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media

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​Homologous Chromosomes

​Homologous chromosomes make up pairs 1 - 22, with the 23rd pair being your sex chromosomes, either an X or a Y. (If your 23rd pair is XY, you are male; if your 23rd pair is XX, you are a female).

​Your mom and dad will give you one-half of a genetically different set. These genetic differences give you the various traits that make you unique.

13

Multiple Choice

If your mom gives you an X and your dad gives you an X, what is your sex?

1

Male

2

Female

14

Multiple Choice

Can your mom give you a Y chromosome?

1

Yes

2

No

15

Multiple Select

What characteristics make up a homologous chromosome? (Choose all that apply)

1

Same size

2

Same gene loci

3

Closest chromosome

4

Same centromere location

16

Open Ended

In your own words tell me what a karyotype is and how we organize it.

Meiosis

by Randy Carpenter

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