Lab exam- Meiosis and male anatomy

What is the goal of the reproductive system

To create genetically unique little ones to continue the species

What do you need to do to accomplish reproduction

1.produce gametes through meiosis

2. Transport gametes

3.nourish/support gametes (in both) and develop fertilized zygote (in female)

4.Provide proper hormonal balance and control

Gametes

Haploid sex cells

Female gametes

Ova (eggs)

Zygote

Fused sperm and egg

Male gametes

Sperm

1n (haploid)

Holds half of the genetic material

2n (diploid)

Entire set of genetic material,

Are gametes 1n or 2n?

Haploid (1n)

Are zygotes 1n or 2n?

Diploid (2n)

Germ cell

Diploid cell that is the cell at the start of meiosis will become a 2 haploid gametes at the end of meiosis

Gameteogenosis

Creation of gamates

3 phases of meiosis

Interphase, meiosis 1, meiosis 2

What happens in interphase?

DNA replication

What happens during meiosis 1?

Prophase- telophase 1

Separation of homologous chromosome pairs

Mnemonic for meiosis

Pasta Makes A Tasty Meal

Product of meiosis 1

2 haploid daughter cells with half the chromosomes in each

What happens during meiosis 2?

Prophase-telophase 2

Separation of sister chormations

Product of meiosis 2

4 haploid daughter cells with half the chromosomes

True or false: meiosis creates cells identical to their mother cell

False, meiosis creates genetically unique cells

Centriole pairs

Microtubule elements that form a spiral apparatus

Which organelle contains DNA?

Nucleus

Which organelle contains DNA?

Nucleus

Interphase

DNA replication, homologous chromosomes are duplicated

Tetrad

Pair of homologous chromosomes

Prophase I

Crossover event occurs ( nonsister chromatids cross and trade segments)

Nuclear envelope dissolves

chromosome condenses

Chromosomes fill cell

Synapsis in prophase I

Arms of nonsister chromatids meet

Metaphase 1

The tetrads align randomly on the spindle equator in the middle of the cell in preparation for anaphase