Bio 13

40 terms by rachel_buehler 

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Gametes are produced by _____________.

Meiosis

Normal human gametes carry _____ chromosomes.

23

Once Meiosis I is completed, all the cells are

Haploid

A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes.

16

Meiosis II begins with 2 _________ cells

Haploid

Meiosis I produces _____ cells, each of which is _____.

two, halpoid

Meiosis II typically produces _____ cells, each of which is _____.

four, haploid

During _____ sister chromatids separate.

Anaphase II

At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.

Telophase I

Homologous chromosomes pair during _________

Prophase I

Synapsis occurs during _____.

Prophase I

Homologous chromosomes migrate to opposite poles during _____.

Anaphase I

During _____ chromosomes align single file along the equator of a haploid cell.

Metaphase II

During _____ a spindle forms in a haploid cell.

Prophase II

A human somatic cell contains _____

44 autosomes and 2 sex chromosomes

In alternation of generations, the diploid stage of a plant that follows fertilization is the _____.

sporophyte

Mitosis results in the formation of _____

two diploid cells

Meiosis results in the formation of ______

two haploid cells

Crossing over is _____.

the exchange of homologous portions of nonsister chromatids

Genetic variation occurs when chromosomes are shuffled in _____ and fertilization.

Meiosis

What is the Haploid Number?

23

Diploid number is ______

46

What is the result of meiosis

one set of chromosomes in each gamete

Casmata

where they cross over

What are the only haploid cells in animals

Gametes

Sporophyte makes haploid ________ by meiosis

spores

Each spore grows by mitosis into a haploid organism by called a ________

gametophyte

Fertilization of gametes results in a ____________

diploid sporophyte

The zygote produces haploid cells by ________

meiosis

Only ______ cells can go through meiosis

diploid

The two cell divisions result in ________ daughter cells, rather than _________ daughter cells in mitosis

4,2

Each daughter cells has _______ as many chromosomes as the parent cell

half

What happens during the first stage of Meiosis

homologous chromosomes seperate

What is reductional division?

meiosis one results in 2 haploid daughter cells

What is equational division

Meiosis II results in 4 haploid daughter cells with UNREPLICATED chromosomes

When does synapsis occur

Prophase I

What is a chiasmate?

where the x-shaped regions where crossing over occured

Are the two sister chromatids gentically similar during Metaphase II

no!

What are cohesions?

protein complexes

What are alleles

mutations of genes

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