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Bio Genetics test
Biology 2017 genetics test review
Term | Definition |
---|---|
homozygous | having identical alleles for a given trait |
heterozygous | having 2 different alleles for a given trait |
recessive | trait that is masked by the dominant allele |
dominant | trait that is visible |
genetics | the area of science that studies heredity |
genotype | genetic makeup of an individual |
phenotype | observed traits described in words |
hybrid | a heterozygous individual |
gene | a specific trait |
allele | one of two or more possible forms of a gene |
Mendel | the "father" of genetics |
Punnett square | a method used to establish the probabilities of the result of a genetic cross |
dihybrid cross | TtBb X TtBb |
homozygous dominant | TT |
homozygous recessive | tt |
heterozygous | Tt |
intermediate inheritance | blending (red + white = pink) |
principle of independent assortment | traits located on different chromosomes sort out independent of one another |
principle of dominance and recessiveness | if a dominant gene is present, it will show up. Both alleles have to be recessive to show recessive. |
principle of the law of segregation | recessive traits can show up generations later when the recessive alleles pair up again |