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Mendel’s
Principles
Genotype and
Phenotype
Types of
Dominance
Genes and
Chromosomes
Misc.
What is genetics?
ANSWER:
The study of heredity
What is the percent chance
that a heterozygous
organism will make a gamete
containing the dominant
allele?
ANSWER:
50%
What is the name of the
diagram that shows all the
possible outcomes of a
genetic cross?
ANSWER:
Punnett Square
What states that allele pairs
separate independently
during the formation of
gametes?
ANSWER:
The principle of independent
assortment
What is a phenotype?
ANSWER:
The way an organism looks
What is a genotype?
ANSWER:
The organism’s genetic makeup
What is a heterozygote?
ANSWER:
An organism that has two
different alleles for the same
trait
In horses, chestnut and white coat colors are co-dominant.
Heterozygous horses have a both colored hairs, which
results in a golden tan color. Such heterozygous horses are
known as palominos (like Mr. Ed).
What colored horses would be the predicted results of a
cross between a chestnut and palomino horse?
(give answer in %)
ANSWER:
50% Chestnut
50% Palomino
S= yellow body
s= blue body
T= round body
t= square Body
How would an individual who
was SStt look?
ANSWER:
Yellow and square body
In “complete dominance” which
allele is masked?
ANSWER:
The recessive one
What is incomplete
dominance?
ANSWER:
Heterozygote exhibits a
phenotype which is
intermediate between the
dominant and recessive.
Neither allele is dominant over
the other, when an organism is
heterozygous it exhibits both
characteristics, what is this
called?
ANSWER:
Co dominance
What are multiple alleles?
ANSWER:
More than two alleles for the same
gene.
What is polygenic inheritance?
ANSWER:
When two or more genes affect a
single trait.
What assorts independently?
ANSWER:
chromosomes
Some genes tend to be inherited
together, what is the name for
this type of inheritance?
ANSWER:
Genetic linkage
Genes are more likely to stay
together on the same
chromosome and NOT separate
during crossing over if they are
closer together or further apart?
ANSWER:
Closer together
DAILY
DOUBLE
What does the principle of
segregation state?
ANSWER:
For any particular trait, the pair of alleles
of each parent separate and only one allele
passes from each parent on to an offspring
Where are most human sex
linked genes found?
ANSWER:
The X chromosome
Why are most sex linked
disorders more common in
males?
ANSWER:
A male only needs to inherit one sex linked
recessive, he only has one X chromosome.
A female needs to inherit two.
What is a dihybrid cross?
ANSWER:
The crossing of organisms differing
in two characteristics
If you cross a Bb individual with
a bb individual what would be
the predicted ratio of their
offspring?
ANSWER:
50% Bb
50% bb
What was the most important
concept that Gregor Mendel
came up with after working
with the pea plants?
ANSWER:
Mendel discovered that traits are passed
down to offspring as individual units,
without any blending of parent
characteristics
What occurs during meiosis
that allows genes located on
the same chromosome to
assort independently?
ANSWER:
Crossing over
Human blood types exhibit
various types of dominance.
Name three
ANSWER:
1. Complete dominance
2. Co dominance
3. multiple alleles
FINAL
JEOPARDY
ANSWER:
Will vary