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WorksheetsStudy Guide Unit IV: Genetics/Heredity
Total questions: 60
Worksheet time: 10hrs 0mins
Which 3 of the following are the processes that increase genetic variation in sexual reproduction?
Crossing Over
Independent Assortment
Mitosis
Random fertilization
Splitting Chromatids (Haploidy)
Why is crossing over important in sexual reproduction?
It combines the two sets of DNA from the mother's egg and the father's sperm
It creates an identical copy of the original DNA
It shuffles the DNA from your parents when you make gametes (sex cells)
It randomly determines which gamete gets which copies of each chromosome.
Worth 3 pts
Select the two genotypes of these two parents.
CcHh
ccHh
CCHh
Cchh
ccHH
Worth 3 pts
What percentage of the offspring from a BbLl x BbLl cross would be expected to be heterozygous for both traits?
Use either the FOIL method or the double-monohybrid method
(a)
This image is an example of:
Codominance
Multiple alleles
Incomplete dominance
Mendelian inheritance
A polygenic trait
If you breed two of the pink flowers together, what would be the phenotypes of the offspring?
100% Pink
75% Pink
25% White
25% Red
50% Pink
25% White
33% Red
33% Pink
33% White
50% Red
50% White
A woman has type AB blood and her husband has type O blood. The doctor tells them their child has type O blood. She thinks this is very strange. Why?
She can't be the mother of a type O child.
Her husband can't be the father of a type O child.
Type O blood is very rare.
There's nothing strange about it.
2 pts
Match the following heredity vocabulary terms
Homozygous dominant
AA
Heterozygous
Ao
Homozygous recessive
oo
Blood Phenotypes
Type A, Type B, Type AB, & Type O
Blood Genotype
AA, AB, BB, Bo, Ao, & oo
_________is used to solve genetic crossing of parents and possible offsprings
Genetics
Punnett Square
Phenotypes
Probability
dominant
Which is not a factor that could increase the rate of mutations in a cell?
exposure to a chemical carcinogen
infection with a virus, such as HPV
exposure of a cell to UV radiation
environmental pressure to adapt for survival
Using the pedigree, determine the possible genotype for individual 1.
WW
Ww
ww
WW or Ww
Using the pedigree, determine the genotype for individual 5.
WW
Ww
ww
WW or Ww
Results in four daughter cells
Mitosis
Meiosis
In incomplete dominance:
one parent doesn't take over the other
the trait forgets what its doing
the trait does not fully express the dominant trait
the dominant trait does not show up
When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....
Incomplete Dominance
Codominance
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross a red flower with a speckled flower. What is the phenotypic ratio?
2 red, 2 speckled
2 red, 2 blue
2 blue, 2 speckled
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross two speckled flowers.
1 red, 2 speckled, 1 blue
2 red, 2 blue
2 blue, 2 speckled
1 red, 1 speckled, 2 blue
A calico cat shows both the traits for orange fur and black fur.
What is a law Mendel discovered
Law of Surpise
Law of Dominance
Law of Gravity
Doppler Effect
A mule is the result of a cross between a donkey and a horse. A mule is a
tetrad
phenotype
genotype
hybrid
A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate.
the offspring will be of medium height
all of the offspring will be short
all of the offspring will be tall
the offspring can be tall or short
The principles of probability can be used to
predict the traits of the off spring of genetic crosses
determine the actual outcomes of genetic crosses
determine which species should be used in genetic crosses
decide which organisms are best to use in genetic crosses
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is
25%
50%
75%
100%
Organisms that have two identical alleles for a particular trait are said to be
hybrid
homozygous
heterozygous
dominant
What principle states that during gamete formation genes for different traits separate without influencing each other's inheritance?
principle of dominance
principle of independent assortment
principle of probabilities
principle of segregation
Variation in human skin color is an example of
incomplete dominance
codominance
polygenic traits
multiple alleles
After reading the excerpt, why did Thomas Hunt Morgan use fruit flies in his studies?
Fruit flies produce a large number of offspring
Fruit flies take a long time to produce offspring
Fruit flies share certain characteristics with pea plants
Fruit flies have a long life span
If an organism's diploid number is 12, its haploid number is..
(Hint: n=2n)
12
6
24
3
Gametes are produced by the process of
mitosis
meiosis
crossing-over
replication
What is show in the figure?
Independent Assortment
Anaphase I of meiosis
Crossing-Over
Replication
Unlike mitosis, meiosis results in the formation of
diploid cells
haploid cells
2N daughter cells
body cells
What is formed at the end of meiosis?
2 genetically identical cells
4 genetically different cells
4 genetically identical cells
2 genetically different cells
Linked genes...
are never separated
assort independently
are on the same chromosome
are always recessive
The farther apart two genes are located on a chromosome, the
less likely they are to be inherited together
more likely they are to be linked
less likely they are to assort independently
less likely they are to be separated by crossing over
The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is 100%.
True
False, 50%
A trait in an unidentified plant is controlled by one gene that has two alleles. One allele is dominant over the other. According to Mendel's principles, one fourth of the offspring made from a cross between two heterozygous plants will show the recessive trait.
True
False, recessive
Coat color in rabbits is determined by a single gene that has multiple alleles.
True
False, polygenic traits
The plants that Gregor Mendel crossed to produce the F1 generation made up the (a) generation.
In the Punnett square shown, the genotypes of the offspring are (a) .
The characteristics of an organism are determined by two factors: (a) and (b) .
An organism's gametes have (a) the number of chromosomes found in the organisms' body cells.
The relative locations of each known gene can be shown on a (a) map.
What attributes of the garden pea plant made it an excellent organism for Gregor Mendel's genetic studies?
What is the phenotype ratio of the off spring of the plants in the Punnett square in Figure 11-3?
How many sets of chromosomes are in a diploid cell?
(a)
Describe a homologous chromosome.
(a)
Identify the genotype of the offspring that would be represented by the question mark?
black, smooth texture
BBRr
white, rough texture
bbRR
Identify the phenotype of the offspring that would be represented by the question mark?
white, rough hair
BBRr
black, smooth hair
bbRR
What are the different phenotypes of the offspring?
black, rough hair
black, smooth hair
white, rough hair
white, smooth hair
