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Bio 13

Gametes are produced by _____________.
Normal human gametes carry _____ chromosomes.
Once Meiosis I is completed, all the cells are
A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes.
Meiosis II begins with 2 _________ cells
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 _____.
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.
What is the Haploid Number?
Diploid number is ______
What is the result of meiosis
one set of chromosomes in each gamete
where they cross over
What are the only haploid cells in animals
Sporophyte makes haploid ________ by meiosis
Each spore grows by mitosis into a haploid organism by called a ________
Fertilization of gametes results in a ____________
diploid sporophyte
The zygote produces haploid cells by ________
Only ______ cells can go through meiosis
The two cell divisions result in ________ daughter cells, rather than _________ daughter cells in mitosis
Each daughter cells has _______ as many chromosomes as the parent cell
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
What are cohesions?
protein complexes
What are alleles
mutations of genes