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33 Cards in this Set

  • Front
  • Back
allele
an alternative form of a gene (169)
anther
the microsporangium of an angiosperm in which pollen grains are
produced (166)
codominance
an inheritance relationship in which neither of two alleles of the
same gene totally masks the other (176)
cross-pollination
a reproductive process in which pollen from one plant is
transferred to the stigma of another plant (166)
complete dominance
an inheritance relationship in which one allele is
completely dominant over the other; both Bb and BB have the same
phenotype (176)
dominant
referring to an allele that masks the presence of another allele for the
same characteristic (168)
dihybrid cross
a cross between individuals that involves the pairing of
contrasting traits (177)
F1 generation
the offspring of cross-pollinated P1 generation plants (166)
F1 generation
the offspring of self-pollinated F1 generation plants
genetics
the field of biology devoted to understanding how traits are passed
from parents to offspring (164)
genotypic ratio
the probable ratio of genotypes produced by a cross (175)
genotype
the genetic makeup of an organism (172)
heredity
the transmission of traits from parents to their offspring (165)
heterozygous
referring to a gene pair in which the two alleles do not code for
the same trait (173)
homozygous
referring to a gene pair in which the two alleles code for the same
trait (173)
incomplete dominance
an inheritance relationship that occurs when both
alleles influence the phenotype (176)
law of independent assortment
law stating that pairs of genes separate
independently of one another in meiosis (168)
law of segregation
law stating that pairs of genes separate in meiosis and each
gamete receives one gene of a pair (168)
molecular genetics
the study of the structure and function of chromosomes
and genes (169)
monohybrid cross
a cross between individuals that involves one pair of
contrasting traits (174)
P1
a strain obtained through self-pollination (166)
pollination
the transfer of pollen from an anther to a stigma of a flower of the
same species (166)
phenotype
the external appearance of an organism that is determined by the
individual’s genotype (172)
phenotype frequency (phenotypic ratio)
a ratio stating the number of times
a specific phenotype occurs in a population in a single generation (175
probability
the number of times an event is expected to happen divided by the
number of opportunities for an event to happen (173)
Punnett square
a model used to establish the probabilities of the results of a
genetic cross (174)
pure
ability to always pass on a specific trait to offspring (166)
recessive
referring to an allele that is masked by the presence of another allele
for the same characteristic (168)
self-pollination
pollination involving the same flower, flowers on the same
plant, or two genetically identical plants (166)
stigma
an expanded apex of a pistil, supported by the style; the part of the pistil
that receives pollen (166)
strain
denotes a plant that is pure for a certain trait (166)
homozygous recessive
testcross the crossing of an individual of unknown genotype with a
individual to determine the unknown genotype (175)
trait
in genetics, a category within which alternate characteristics, such as height
and eye color, can be observed (165