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28 Cards in this Set
- Front
- Back
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The number of people estimated to have ever been born?
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100 billion
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cause of the Earth's season?
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the earth's axis of rotation is tilted in its orbital plane
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elements such as carbon, oxygen, nitrogen, iron are?
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forged in the stars
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cystic fibrosis affects the func of the respiratory tract through the?
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covering of the alveolar cells w/mucus
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the alternation of DNA seq?
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mutation
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Meiosis is the process of prod?
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sperm, eggs, gametes
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DNA backbone is made of?
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sugar and phosphate
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watson and crick received a nobel prize when? what?
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1962
discovery of the struc of DNA |
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genetic code contains how many bases?
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3
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dom traits?
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free ear lobe
widow's peak brown eye color |
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tay-sachs, there is full enzyme prod, if genotype is?
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TT
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in human population, 1 in__ carries at least one copy of the defective genes that are currently know to cause what?
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1/20
genetic disorders |
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the portion of the human genome that encodes all the genes is what percent?
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1.5%
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human body has on average 100 what cells?
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100 trillion
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prokaryotic cells include?
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bacteria
no organelle |
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formation of tissue/organ/body plans begin during?
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gastrulation
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gastrulation begins at___days after_____formation?
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10-14 days
zygote formation |
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what is a female sex organ homologous to the penis?
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clitoris
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penile erection is mediated through?
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corpus cavenosum
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the clitoris and the what are homologous organs?
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penis
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humans/chimps sim?
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frontal cortex
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what does the flagellum provide for the sperm cells?
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propelling forces for motillity
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precursor for the male sexual reprod organs is the what duct?
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Wolffian duct
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clown fish have a sex determination sys of?
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protandry sequential hermaphrodites
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turner syndrome is the result of a chrom configuration of?
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XO
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human ovum is?
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largest cell in the human body
prduced in the ovary visible to the naked eye surrounded by a layer -of follicle cells |
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ovum is protected by?
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zona pellucida
corona radiata |
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male red-spiders use what to compete for mates?
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mating gifts?
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