Biology, Cell Division and Reproduction, Q3

zygote

a fertilized egg cell

a condition in which the gametes are the same shape and size

isogamy

eggs

large, nonmotile gametes

oogamous

organisms having eggs and sperm

gametangium

produces gametes

the genetic requirement for evolution to operate is

the acquiring of new genetic information during reproduction

isogamy

the condition common to protozoa whereby the cell of the organism acts as a gamete

anisogamy

the condition in which gametes of the same species have the same shape, but different sizes

genetic variability

the uniqueness of individual offspring

three advantages to sexual reproduction

- produces genetic variations - produces resistance to unfavorable conditions - produces disease-free seed plants

gonad

a generalized term for organs in animals which produce sex cells

archegonium

always contains an egg cell

The genetic information which a gamete contributes to a new individual also differs somewhat from

each of its parents.

oogamy always involves fertilization from

gametes of differing sizes

Many isogamous organisms have some genetic differences in their

gametes, even though we cannot tell any difference by observing them under a microscope.

ovary

in flowering plants the egg occurs in this

The gametes used in sexual reproduction vary from the genetic composition of the parents because of

meiosis in which genetic recombination occurs.

successful breeding is limited to the gametes of the

same created "kinds" of organisms

conjugation occurs in isogamous protists and involves

the transfer of genetic information between organisms

it is possible for some microorganisms to have

two sexes

the maximum number of sperm that can fertilize one egg is one

in order to yield a diploid chromosome condition

genetic variability for many animals and plants is the result of

a process called sexual reproduction