Adaptations & Evolution

15 terms by mdeerman 

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Terms from Ecology Ch. 2

fitness

contribution an individual makes to future generations

directional selection

the mean value of a trait is shifted toward one extreme over another

stabilizing selection

favor individuals near the middle of the population mean

disruptive selection

favors both extremes of the population mean

dominant

gene that is represented by a capital letter & is expressed if present

recessive

gene that is represented by a lower case letter & masked over by the dominant gene

DNA

nucleic acid that contains the genetic code for all traits in an organism

gene

section of DNA that codes for traits

homozygous

gene that contains alelles that are the same

heterozygous

gene that contains alelles that are different

genotype

the gene combination of an organism

phenotype

the physical appearance of an organism

mutation

a change in the sequence of DNA

sexual reproduction

reproduction that involve two parents

asexual reproduction

reproduction that involves only one parent

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