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15 Cards in this Set

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  • Back
a graphic used to predict the chances that offspring will inherit an allele for a trait
punnett square
the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
test cross
the likelihood that a possible future event will occur in any given instance of the event.
a diagram that shows the occurrence of a genetic trait in several generations of a family
a trait that is determined by a gene found on one of the sex chromosomes
sex-linked trait
a characteristic of a living thing that is determined by many genes
polygenic trait
a condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully
incomplete dominance
more than two alleles (versions of a gene) for a genetic trait
multiple alleles
a condition in which both alleles for a gene are fully expressed
one of the two strands of a chromosome that become visible during meiosis or mitosis
the area of the chromosome that holds the two sister chromatids together during mitosis
chromosomes that have the same order of genes, that have the same structure, and that pair during meiosis
homologous chromosomes
a cell that contains two haploid sets of chromosomes
cell, nucleus, or living thing that has only one set of unpaired chromosomes
the cell that results when gametes join; a fertilized egg