3.4 Cell Division Part 5 Flashcards
Is there an interphase between meiosis I and II?
yes but it is short
What is the main purpose of meiosis II?
to form cells that contain a haploid number so when gametes form they each contribute half the chromosome needed for a cell
What occurs during prophase II?
each dyad remains condensed
What happens during metaphase II?
centromeres are lined up along the metaphase plate
What happens during anaphase II?
sister chromatids from each dyad are pulled apart and brought to opposite end poles
What occurs during telophase II?
cytokinesis occurs to make two separate cells
How many gametes are formed from one round of full meiosis?
four haploid gametes
What is the most significant difference between mitosis and meiosis?
crossing over leading to genetic diversity
What is the process called of production of a male gamete? Female gamete?
spermatogenesis
oogenesis
Where does spermatogenesis occur?
testes
What is a general overview of spermatogenesis?
undifferentiated diploid germ cell enlarges to become a primary spermatocyte, undergoes meiosis I to become a secondary spermatocyte, and undergoes meiosis II to produce male spermatids
What is a general overview of spermatozoa?
haploid and all contain an equal amount of cytoplasm
What is the main difference from oogenesis and spermatogenesis?
all sperm will contain equal amounts of cytoplasm, eggs will have different amounts
What is the primary oocyte?
egg cell that contains almost all of the cytoplasm from cell differentiation
What is the purpose of having a large amounts of cytoplasm in the primary oocyte?
needed to sustain the developing embryo
