Heredity and Genetics
Gregor Mendel made an important
discovery while working with pea
plants. What was it?
Each trait had two sets of instructions, one from
When there is incomplete
dominance, what happens with
Each allele has its own degree of influence.
Body cells have twice the number
of chromosomes of
What did the model of DNA built
by Watson and Crick resemble?
a long, twisted ladder
When replicating, DNA splits
down the middle
One example of __________ is in
the production of insulin for
diabetics. Scientists create
recombinant DNA using a normal
human insulin gene and bacteria
Sickle cell anemia is an example of
a disorder that is caused by a
The genetic make-up of an
organisms is called its
________ chromosomes are found
in each human sex cell.
In pea plants, tallness is dominate
over shortness. Create a Punnett
Square that shows the crossing of
two heterozygous tall pea plants.
What are the possible genotypes?
TT, Tt, Tt, tt
________ is the mathematical
chance that something will
A(n) _______ mutation is one
where a base has been added.
Name the four bases.
adenine, thymine, cytosine, and guanine
Different forms of characteristics
When an organism has two
dominant or two recessive alleles,
it is said to be _________________.
_________ is the passing of traits
from parents to offspring.
Rosalind Franklin used x-ray
diffraction to show that DNA’s
shape is ___________.
Create a Punnett Square that shows
outcomes for gender. What is the
probability of getting a male or a
__________ and ___________
make up the sides of the DNA
A base is left out in a
___________ are used to organize
possible offspring combinations.
Scientists and farmers use
___________ to create bigger and
better offspring from crops and
What is the complimentary strand of
DNA for the following sequence:
A __________ is a string of
nucleotides that has instructions
for a certain trait.
____________ make up the rungs
of the DNA ladder.
In pigs, curly tails are dominant over
short tails. How is it possible for
parents with curly tails to have
offspring with short tails?
If both parents genotypes are heterzygous (Cc).
A ___________ is the physical
appearance of a characteristic.
A _________ is a diagram to trace
a trait from generation to
Sex-linked traits occur most often
in ________ because they have
only one X chromosome.
___________ is the study of
heredity and inherited traits.
Each _______ consists of three
different materials: sugars,
phosphates, and bases.
When an organism has a pair of
heterozygous alleles, it is called a