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Biology Study Guide CH 11 Introduction To Genetics Sections 1-3
Gregor Mendel used pea plants to study the ________________ of traits.
Offspring that result from crosses between parents with different traits are called ________.
Gregor Mendel removed the male parts from the flowers of some plants in order to make controlled
________________ between plants…this also PREVENTED self pollination.
The chemical factors that determine traits are called _____________.
Gregor Mendel concluded that traits are inherited through the passing of factors from _____________ to
______________.
When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited an allele for ___________
from the tall parent and an allele for _________ from the short parent.
The Principle of Dominance states that some alleles are _________________ and others are _____________.
When Gregor Mendel crossed True-Breeding TALL plants with True-Breeding SHORT plants, all the offspring
were tall because the allele for tall plants is _________________.
All tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate, what will the
phenotypes of the offspring be?
In the P generation, a tall plant was crossed with a short plant. Short plants reappeared in the F2 generation
because the allele for shortness and the allele for tallness _____________ when the F 1 plants produced
gametes.
When you flip a coin, what is the probability that it will come up tails?
The principles of probability cab be used to _____________ the traits of the offspring produced by genetic
crosses.
In the P generation, a tall plant is crossed with a short plant. The probability that an F2 plant will be tall is
________%.
Organisms that have two identical alleles for a particular trait are said to be ___________________.
From a 4 square Punnett Square that is filled out, be able to answer questions.
What all does a Punnett Square show? Give several details.
If you made a Punnett Square showing Gregor Mendel’s cross between true-breeding tall plants and truebreeding short plants, how would the geneotype of the offspring compare with the genotype of the parents?
_________________________________________-states that during gamete formation, genes for different traits
separate without influencing each other’s inheritance.
Be able to answer questions from a 16 square Punnett Square that is filled out…be able to apply the genetic
principles learned in CH 11 to the square.
Be able to determine how many different allele combinations would be found in the “gametes” produced by a
pea plant of a given genotype containing a two-factor cross….For example…when we did our 16 squares…you
started with “gametes” such as…RRYY…and from this you had to create a 4 square gene combination…the
offspring in the 4 squares…would give you the “different allele combinations”…
You WILL have to work out a 16 square genetic 2 factor cross…
Situations in which one allele for a gene is not completely dominant over another allele for that gene are called
__________________________ __________________________.
Variation in human skin color is an example of a __________________________ trait.
Gregor Mendel’s principles of genetics apply to _____________ organisms.
Define Codominance and give an example of codominance.
Why Did Thomas Hunt Morgan use fruit flies in his studies?
The plants that Gregor Mendel crossed to produce the F1 generation made up the _________ generation.
Different forms of a gene are called ______________.
___________________ is the likelihood that a particular event will occur.
If you flip a coin 5 times and it comes up heads each time, the probability that it will come up heads the next
time is _______________.
From a partially filled out 16 square 2 factor cross, be able to fill in the blanks- giving both the phenotype and
genotype for the blank.
Diagram of red snapdragons (flowers) & ivory snapdragons…the p generation, F1 generation, & F2 generation
are shown. You will have to answer questions regarding the diagrams.