Meiosis

A lot of the information is copied from the Cell cycles so learn that first

What is asexual reproduction

Reproduction through mitosis and offspringare genetically identical

What is sexual reproduction

reproduction through union of gametes

What is non reproductive genetic recombination

an exchange of genetic material without reproduction

What is a gamete

Reproductive cells (egg and sperm)

What is a zygote

A product of fertilization

What is a somatic cell

Body cells that are not specialized for reproduction

What is the result of meiosis

Reduction in number of chromosomes

What is crossing over?

Exchange of genetic material between non sister chromatids of homologs

What is the main difference of meiosis I vs meiosis II

Meiosis II has no additional DNA replication and results in 4 total nuclei rather than 2 nuclei

What are synapsis

Pairing and adhering of homolongs

What is a tetrad?

Paired duplicated homologs (4 chromatids)

True or false: DNA replicates in Meiosis II during Interphase

False

What is nondisjunction

failure of chromosomes/sister chromatids to separate

What is aneuploidy

Where one or more chromosomes is in excess or absence

What is translocation

When part of a chromosome breaks away and attaches to another

What is trisomy

3 copies of 1 chromosome

What is polyploidy

2 or more complete sets of chromosomes

Is polyploidy lethal in plants

Nonlethal

Is polyploidy lethal in animals

lethal

True or false: Triploid can undergo meiosis

false

True or false: tetraploid can undergo meiosis

true

What is mitosis?

duplication of cell

What is meiosis

Reduction of number of chromosomes