Alleles - ANSWER The different forms of a gene. Y and y are different alleles of the
gene that determines seed color. Alleles occupy the same locus, or position, on
chromosomes.
Autosome - ANSWER Any chromosome that is NOT a sex chromosome.
Co-dominant alleles - ANSWER Two different alleles at a locus are responsible for
different phenotypes, and both alleles affect the phenotype of the heterozygote.
Dominant trait - ANSWER A trait expressed in the phenotype if the dominant allele is
present in the genotype.
F1 generation - ANSWER Offspring of a cross between the parental (P1) generation.
F2 generation - ANSWER Offspring of a cross involving the F1 generation.
Genotype - ANSWER The genetic constitution of an organims with respect to a trait.
For a single trait on an autosome, an individual can be homozygous for the dominant trait,
heterozygous, or homozygous for the recessive trait. Yellow seeds are dominant, but yellow
seeded plants could have a genotype of either YY or Yy.
Heterozygous - ANSWER differing alleles for a trait in an individual such as Rr.
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gene that determines seed color. Alleles occupy the same locus, or position, on
chromosomes.
Autosome - ANSWER Any chromosome that is NOT a sex chromosome.
Co-dominant alleles - ANSWER Two different alleles at a locus are responsible for
different phenotypes, and both alleles affect the phenotype of the heterozygote.
Dominant trait - ANSWER A trait expressed in the phenotype if the dominant allele is
present in the genotype.
F1 generation - ANSWER Offspring of a cross between the parental (P1) generation.
F2 generation - ANSWER Offspring of a cross involving the F1 generation.
Genotype - ANSWER The genetic constitution of an organims with respect to a trait.
For a single trait on an autosome, an individual can be homozygous for the dominant trait,
heterozygous, or homozygous for the recessive trait. Yellow seeds are dominant, but yellow
seeded plants could have a genotype of either YY or Yy.
Heterozygous - ANSWER differing alleles for a trait in an individual such as Rr.
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