Asexual vs Sexual Reproduction

​Inheritance of Traits

TEKS 8.Aanalyze the significance of chromosome reduction, independent assortment, and crossing-over during meiosis in increasing diversity in populations of organisms that reproduce sexually;

​We will explore the differences between asexual and sexual reproduction.

I will examine a karyotype of a sexually reproducing organism and identify homologous chromosomes, autosomes and sex-chromosomes and explain the basics of gamete formation.

Poll

Which type of reproduction do you think contributes to genetic inheritance of traits?

• Asexual Reproduction

• Sexual Reproduction

Open Ended

What is the difference between asexual reproduction and sexual reproduction?

Categorize

Options (8)

1 parent

2 parents

offpsring are identical

offspring are unique

doesn't involved sperm or egg cells

involves sperm and egg cells

uses Somatic cells only

requires Gamete cells

Categorize the characteristics of Asexual and Sexual Reproduction to the best of your current ability.

Asexual

Sexual

Open Ended

What was something new you learned from the video?

At your table, share one thing you learned from the video.

You have 1 minute and 30 seconds.

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Turn and Talk

​Asexual Reproduction

• A = Not or Without

• 1 parent

• Somatic (body) cell only

• No Sperm/egg

• Cells are Diploid (2N)

• Divide using Mitosis

• Genetically identical offspring

Sexual Reproduction

• 2 parents

• Sperm and Egg (Gametes)

• Parents are Diploid (2N)

• Gametes are Haploid (n)

• Divide using Meiosis

• Offspring are genetically unique

​Before we learn how gametes form, we need to learn a little more about Chromosomes!

​Chromosomes and Karyotypes

​Homologous Chromosomes

• Same length w/same Genes

• Present in Somatic diploid cells only

• 1 set inherited from each parent

Open Ended

What is a different Real World concept that you could use to compare Homologous Chromosomes to?

Autosome Chromosomes

• Chromosome pairs 1-22

• Genes for most non-sex-related traits

Sex Chromosomes

• Determines sex characteristics of organism

• X codes for 1K+ proteins

• Y codes for ~80

• XX indicates female sex

• XY indicates male sex

Categorize

Options (9)

mainly Somatic cell traits

Sex characteristics

Same length

same genes

1 set from each parent

XX female

XY male

cells made through Mitosis

cells made through Meiosis

Place the characteristics in the correct category.

Homologous Chromosomes

Autosomes

Sex Chromosomes