mitosis and meiosis Flashcards
(30 cards)
how many humans have
body cells: 46 sex cells: 23
what’s interphase in meiosis
before meiosis only happens once duplicates in the chromosomes
how many times does meiosis divide
two
what happens in prophase one
chromosomes condense and cross over
what is reduction division
The way meiosis happens because the number of chromosomes for the species is cut in half
her body cells haploid or diploid
diploid
what happens in metaphase one
tetrads lined up along equator
what happens in anaphase one
Homelogous just pairs separate and moving to opposite poles
what happens in Tele phase 1
cytoplasm divides to separate the double-stranded chromosomes
what happened to ProPhase 2
xNew spindles appear chromosomes begin to move
how are egg and sperm cells produced
Gameogenesis
where are gametes formed
in the gonads
what’s the male and female gonads
female: ovaries male: testes
what does spermatogenesis produce
for sperm cells of equal size
what is oogenesis
One large egg and three polar bodies
what are the characteristics of the sperm
Head with flagella, mobile, .05 mm in diameter
One of thecharacteristicsof an egg
round shape, non-mobile, .10 mm in diameter
parthenogenesis
development of an unfertilized egg into an adult without fertilization
what is the result of fertilization
A diploid zygote
external fertilization
give me tonight outside the body of the female produces lots of eggs because of low survival rate
internal fertilization
Gammy tonight inside the body of the female produced one or a few eggs because of high survival rate
what’s meiosis
The making of sperm and egg cells
how do bacteria reproduce
asexually
can reproduction take place if the male or female does not mature
no
