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35 Cards in this Set
- Front
- Back
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What is the "Mendelian ratio"?
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3:1
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What is the Law of Segregation?
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States that alleles segregate independently of each other when forming gametes..any gamete is equall likel to posses any allele
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Inbreeding causes what?
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More homozygotes
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Outbreeding cuases what?
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More heterozygotes
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What is the Law of Independent Assortment?
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States that genes located on different chromosomes assort independently of each other..genes that code for color and height are indep.
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Name an r-selected species.
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a cockroach
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Name a K-selected species.
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a sloth
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What type of growth curve is represented by K-selected species?
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sigmoidal growth curve
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What is Divergent evolution?
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exists when two or more species from the same ancestor maintain a similar structure
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What is Convergent evolution?
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exists when seperate species evolve similar traits (bird's wing and bat's wing)
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The occurance of distinct forms is called what?
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polymorphism
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first filial
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first generation when considering genetic crosses
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phenotypic ratio of a dihybrid cross
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9:3:3:1
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karyotype
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map of the chromosomes
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sex-linked
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gene that is found on the sex chromosome
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barr body
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Condensed X chromosome whose genes become inactive.
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gene pool
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total of all alleles in a population
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evolution
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change in the gene pool
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List the specific groupings in order on the taxonomical classification system
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Kingdom> Phylum>Class>Order> Family> Genus>Species
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Vertebrata
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subphylum of Chordata
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Name the three domains
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Bacteria, Archaea, Eukarya
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symbiosis
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relationship that exists between two species
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mutualism
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relationship that is beneficial for both
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commensalism
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beneficial for one and not affect the other
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parasitism
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beneficial for one and detrimental to another
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Name the five characteristics of the Hardy- Weinberg equilibrium
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1. large population 2. mutational equilibrium 3. immigration or emigration must not change the gene pool 4. random mating 5. no selection for the fittest organism
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genetic drift
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occurs when one allele is permanently lost due to the death of all members having that allele.
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Urey-Miller Experiment
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early experiment that attempted to recreate Earth's primitive atmosphere.
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The first cells evolved from __________, lipid or protein bilayer bubbles.
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coacervates
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Chordata
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phylum containing humans
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Deuterostomes
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Buttholes developed from or near the blastopore
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protosome
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mouth develops from or near the blastopore
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Coelum
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body cavity with mesodermal tissue found in chordata
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notochord
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embryonic axial support; not the backbone
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Chordates possess which distinguishing characteristics
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pharyngeal gil slits, dorsal hollow nerve cord, tail, notochord
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