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DEFINITION
PICTURE
- Passing of traits from
generation to generation
Heredity
Structures in the nucleus made
of DNA which contain genetic
information
Chromosomes
Genetic material which codes for
an organism’s traits
Segment of DNA on a
chromosome
Feature that an organism inherits
from its parents, such as eye
color, that is coded for by DNA.
Alternate forms of a gene;
produce variations in traits.
DNA
Genes
Trait
Tt
Alleles
Genes or alleles for a particular
trait are alike; for example, BB
or bb.
rr or
RR
Homozygous
(Pure)
Genes on the chromosome are
different; for example, Bb.
-Another name for heterozygous,
alleles for a trait are different
- Allele that will show its effect
on the phenotype only when two
of the same alleles are present in
Rr
Heterozygous
(Hybrid)
Hybrid
r
the genotype
Allele that will show its effect on
the phenotype
whenever it is present
in the genotype
Recessive
Dominant
Genes that an organism has—its
genetic makeup
Genotype
R
Observable product of genetic
makeup and the environment’s
influences on that genetic
makeup; physical appearance.
Known as the father of genetics
for his early heredity
experiments
Model used to predict the
offspring of crosses of known
genotypes.
Study of heredity
Phenotype
Mendel
Punnett Square
Genetics