sexual and asexual reproduction. Flashcards
how is a human made?
sperm and egg fertilise.
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turns into a zygote.
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mitosis.
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turns into an embryo.
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differentiation.
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person.
what is variation?
differences within/ between species.
is there variation in the offspring of sexual reproduction?
yes.
can both plant and animals reproduce sexually?
yes.
how many parents are there in asexual reproduction?
1.
which type of reproduction produces clones?
asexual.
characteristics of sexual reproduction?
variation in offspring.
can happen in plants and animals.
2 parents needed.
doesn’t reproduce clones.
fusion of gametes.
mixing of genetic information.
genetically non-identical offspring.
DNA is inherited from parents.
characteristics of asexual reproduction?
produces clones.
no mixing of genetic information.
1 parent needed.
DNA inherited from parent.
can happen only in plants.
genetically identical offspring.
no variation in offspring.
no fusion of gametes.
what are the advantages of sexual reproduction?
produces variation that helps survival through natural selection if the environment changes.
natural selection can be speed up be humans in selective breeding to increase food production.
what are the disadvantages of sexual reproduction?
at least 2 gametes needed.
slower and takes time and energy to find a mate or spread gametes.
what are the advantages of asexual reproduction?
only 1 parent needed.
can happen in plants and animals.
can quickly reproduce.
time and energy efficient.
what are the disadvantages of asexual reproduction?
at higher risk of disease as no variation.
if 1 organism can’t survive then none can.
produces clones/ no mixing of DNA.
genetically identical copies.
what are the male and female gamete of flowering plants and animals?
male gamete of flowering plants: pollen.
male gamete of animals: sperm.
female gamete of flowering plants: ovum.
female gamete of animals: egg.
