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19 Cards in this Set

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  • Back
multiple genes
pattern of inheritance(continuous variation) produced by many genes affecting a particular trait (for example, skin color in humans)
incomplete dominance
pattern of inheritance in which neither allele is dominant and three totally different phenotypes can occur
sex chromosome
X and Y chromosomes that are different between the sexes and that are involved in sex determination
allele
either of two alternative forms of a gene for a particular trait such as flower color
recessive
the form of a trait that is hidden in the F1 generation
heterozygous
organism in which each cell contains two different alleles for a certain trait
multiple alleles
set of three or more different lleles that control a trait
sex-linked trait
an inherited trait, such as eye color in fruit-flies, determined by a gene on the sex chromosome
genotype
combination of alleles for a certain trait
autosome
chromosomes other than sex chromosomes
genetics
science of inheritance of traits
modifier gene
genes interacting with each other to control particular traits, such as eye color
phenotype
physical appearance of an organism as determined by a particular genotype
codominance
occurs when one allele is not dominant; both alleles are expressed equally
heredity
transmission of traits from parents to offspring
continuous variation
gradations in traits(for example, variation of ears of corn as a result of the presence of many different phenotypes
gene
factor containing information for every trait
homozygous
organism in which each cellcontains two of the same alleles for a particular trait
dominant
form of a trait that dominates another trait