Download Chapter Six Test Notes

Chapter Six Test Notes
Heredity

An example of how
several genes
influence one trait is
shades of eye color
in humans.

The mathematical
chance that
something will
happen is known as
probability

If a plant with the
genotype PP is
crossed with a plant
with the genotype
pp, the possible
genotypes of the
offspring are Pp, Pp,
Pp, Pp.
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If
a plant with
the genotype Pp
is allowed to
self-pollinate,
the possible
genotypes are
PP, Pp, pP, pp.

When a firstgeneration plant
self-pollinates, the
ratio of dominant to
recessive traits in
the secondgeneration plants is
3:1.
 When
parents
with different
traits are bred, a
trait that
reappears in the
second
generation after
disappearing in
the first
generation is a
recessive trait.

When a plant selfpollinates and all
offspring have the
same trait as the
parent, it is called
true-breeding plant.

Mendel removed the
anthers of one plant
to be sure that his
pea plants did not
self-pollinate.

Sperm from one
plant fertilizes the
eggs of the same
plant in selfpollination.

The passing of
genetic traits from
parent to offspring is
called heredity.
The
ratio of
dominant
traits to
recessive
traits in
secondgeneration
plants is 3:1.
 One
gene
influences eye
color and fur
color of a white
tiger.
 Recessive
traits
seem to
disappear in the
first generation.

During meiosis, the
first time the nucleus
divides, the
homologous
chromosomes
separate.

Phenotype is an
organism’s
appearance.

Chromosomes that
carry the same set
of genes are called
homologous
chromosomes.

There are usually 46
chromosomes in a
human body cell.
 During
the
process of
meiosis, four
haploid cells
are formed from
the original
diploid cell.
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