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35 Cards in this Set
- Front
- Back
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Gamete have how many chromosomes? |
23 chromosomes |
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How many gametes are produced after meiosis? |
Four |
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What is a gamete? |
A gamete is a sex cell (egg or sperm) |
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What is a haploid? |
A cell with only a single set of unpaired chromosomes (only has 23 chromosomes) |
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Fertilization occurs where in plants? |
Pollen comes from the stamen (the male part of the plant) and gets transferred to the pistl (the female part of the plant |
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What is pollination? |
The transfer of male gametes in pollen from the stamen (male reproductive part of the plant) to the pistl (the female part of the plant) |
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Watson and crick discovered what in the cell? |
They discovered the double helix (in dna) |
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What is sexual reproduction? |
A form of reproduction that requires two parents |
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How does sexual reproduction differ from asexual reproduction? |
Sexual reproduction needs two parents to be able to make offspring but asexual reproduction just needs one parent |
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How are inherited characteristics determined in humans? |
The result of sexual reproduction randomly sorts or shuffles dna |
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Watson and crick discovered what in the cell? |
They discovered the double helix (in dna) |
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What is sexual reproduction? |
A form of reproduction that requires two parents |
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How does sexual reproduction differ from asexual reproduction? |
Sexual reproduction needs two parents to be able to make offspring but asexual reproduction just needs one parent |
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How are inherited characteristics determined in humans? |
The result of sexual reproduction randomly sorts or shuffles dna |
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What is the outcome of meiosis? |
Two daughter cells and two grand daughter cells |
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Watson and crick discovered what in the cell? |
They discovered the double helix (in dna) |
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What is sexual reproduction? |
A form of reproduction that requires two parents |
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How does sexual reproduction differ from asexual reproduction? |
Sexual reproduction needs two parents to be able to make offspring but asexual reproduction just needs one parent |
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How are inherited characteristics determined in humans? |
The result of sexual reproduction randomly sorts or shuffles dna |
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What is the outcome of meiosis? |
A zygote (fetus) |
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What is sexual reproduction? |
A type of reproduction that involves/needs two parents |
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What do eggs and sperm have in common? |
They r both gametes (sex cells) |
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What is reduction division? |
Meiosis 1 (because the chromosomes r going from 46 to 23) |
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What does a zygote develop into? |
A fetus |
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What happens in the second trimester of pregnancy? |
The Baby's organs fully develop and closer to the end u can start to feel the baby move around |
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Which structures are only found in the male reproductive system? |
-penis -urethra -scrotum -testes -prostate -seminal vesicles -vas deferens -cowpers gland |
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What structures are only found in the female reproductive system? |
-vagina -cervix -ovaries -uterus -fallopian tubes |
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What are some advantages of sexual reproduction? |
-very little energy is required to find a mate (external) -greater numbers of offspring can repopulate an area after a disaster (external) -more protection is given to the embryo and more parental care is given to offspring (internal) -offspring are genetically different from their parents so they may survive new diseases or other threats that appear in a population |
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What are some disadvantages of sexual reproduction? |
-more energy is generally required to find a mate (internal) -fewer offspring are produced so if the number of predators increases a population will decline (internal) Gametes embryos and offspring are unprotected and are often prayed upon (external) -some beneficial traits may not be passed on from parents to offspring |
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What are the three stages of sexual reproduction? |
1.mating 2.fertilization 3.development |
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Know the stages of meiosis? |
Back (Definition) |
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What is genetic diversity? |
Variation or inherited genetic differences in species |
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What is external fertilization? |
When the egg and sperm meet outside the parents bodies |
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What is internal fertilization? |
When the sperm cells are deposited inside the females body where they meet a egg cell |
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What happens during the first trimester? |
-All the organs systems begin to form -at four weeks the brain and spinal cord are developing |
