plant biology

(2N) a cell haveing two sets of chromosomes 1 from mom and 1 from dad

(1N) a cell having one set of chromosomes a sex cell (egg or sperm)

• division of diploid parent cell into two identical diploid daughter cells.
• Occurs during growth and asexual reproduction

• division of diploid parent cell into four different haploid gamete cells
• occurs during sexual reproduction to produce egg or sperm

• PMAT
• P=prophase (paired)
• M= Metaphase (middle)
• A= anaphase (apart)
• T= telophase (two cells)

cell plate forms between the new cells (cell wall plus middle lamella)

daughter chromosomes become longer, thinner...then indistinguishable

four different haploid gametes

the chromosome pair have copied themselves Paired

middle=chromosomes align at the metaphase plate along the cent or equator of the cell

apart=sister chromatids of each chromosome pair separate as they are pulled to opposite poles

two cells=saughter chromosomes surrounded by a new nuclear envelop and become longer thinner nucleoli reapper

a nuclear body containing genes in a linear order

the half chromosome during prophase and metaphase of mitosis, and between prophase I and anaphase II of meiosis

the region of a chromosome that binds to the spindle during mitosis

• reductive division
• Prophase I
• Metaphase I
• Anaphase I
• Telophase I

• equational division
• Prophase II
• Metaphase II
• Anaphase II
• Telphase II

chromosomes pairs may exchange parts with each other

where crossover occurred

• paired and copy themselves(mitosis)
• Prophase I=meiosis I redutive division
• Prophase II = meiosis II equaitonal division