Reproductive Physiology Flashcards
when are dyads visible
both mitosis and meiosis
when are tetrads visible
meiosis only
the product is two diploid daughter cells genetically identical to the mother cell
mitosis only
the product is four haploid daughter cells quantitatively and qualitatively different from the mother cell
meiosis only
involves the phases prophase, metaphase, anaphase, and telophase
both mitosis and meiosis
occurs throughout the body
mitosis only
occurs only in the ovaries and testes
meiosis only
provides cells for growth and repair
mitosis only
homologues synapse, crossovers are seen
meiosis only
chromosomes are replicated before the division process begins
both mitosis and meiosis
provides cells for perpetuation of the species
meiosis only
consists of two consecutive nuclear divisions without chromosomal replication occurring before the second division
meiosis only
what occurs during synapsis
pairing of homologous chromosomes
why is crossover important
it introduces variability in the daughter cells because homologues separate and exchange parts
what ere homologous chromosomes
egg and sperm chromosomes that carry genes for the same traits(one paternal and one maternal)
primitive stem cell
spermatogonium
haploid
secondary spermatocyte, spermatid, sperm
provides nutrients to developing sperm
sustentocyte
products of meiosis 2
spermatid
product of spermiogenesis
sperm
product of meiosis 1
secondary spermatocyte
why are spermatids not considered functional gametes
they are nonmotile, too much superfluous cytoplasm
what is spermatogenesis
formation of haploid gametes by the male
what is spermiogenesis
sloughing off excessive spermatid cytoplasm to form a motile functional sperm
why is the life span of sperm so short
no cytoplasm in which to store nutrients
what is a follicle
structure consisting of a capsule of follicle cells that encloses a developing gamete
