Sexual rep. quiz Flashcards
gamete
sex cells (sperm + egg)
How many chromosomes does the head of sperm contain?
23
how many chromosomes does the nucleus of an egg contain?
23
what cell division produces sex cells?
meiosis
zygote
fertilized egg cell
how many chromosomes are in a zygote
46
as soon as the zygote starts growing/dividing it is called an…
embryo
what type of cell division occurs during cleavage?
mitosis
what body cells don’t have 46 chromosomes?
sex cells
morula/…
ball of cells
how many cells make up morula stage?
32
how many divisions are required to produce an embryo?
5
How do you go from a zygote to a multicellular organism?
mitosis
Aquatic fertilization
external
aquatic development
external
do aquatic animals give parental care?
no
terrestrial development
external or internal
terrestrial fertilization
internal
what does meiosis do to chromosome #?
reduces by half
fertilization
combining of egg and sperm
what does fertilization produce?
a zygote
cleavage
increase in cell # rapidly
differentiation
cells getting their “job” by processing different parts of DNA
in what sex organs are gametes produced?
testes and ovaries
