A segment of DNA on a chromosome that codes for a specific trait
A variation of a single gene that controls an inherited characteristic.
An organism that has two identical alleles for a trait
An organism that has two different alleles for a trait
An organism's genetic makeup, or allele combinations.
An organism's physical appearance, or visible traits.
Describes a trait that covers over, or dominates, another form of that trait.
An allele that is masked when a dominant allele is present
Passing of traits from parents to offspring
law of independent assortment
states that genes for different traits are separated independently during the formation of gametes. (traits are not "linked")
law of segregation
states that the pairs of homologous chromosomes separate in meiosis so that only one chromosome from each pair is present in each gamete
law of dominance
states the dominant trait is always expressed over the recessive trait if its allele is present.
A pattern of inheritance in which the phenotypes of the heterozygote and dominant homozygote are indistinguishable.
A pattern of inheritance in which two alleles, are neither dominant nor recessive. The resulting offspring have a phenotype that is a blending of the parental traits. (ex. pink flowers)
A pattern of inheritance in which both alleles for a gene are fully expressed. (ex. roan cows)
Pair of chromosomes that are the same size, same shape and same genes.
Replicated forms of a chromosome (identical) joined together by the centromere and eventually separated during mitosis or meiosis II.
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