WorksheetsAP Biology - Chapter 11
Total questions: 50
Worksheet time: 50mins
If the parents are heterozygous for cystic fibrosis (Ff x Ff), then each offspring has a _____ chance of having cystic fibrosis.
2%
25%
50%
75%
E = unattached earlobes. e = attached earlobes. In the cross of Ee and Ee, the chance of a child with unattached earlobes is _____.
1/2
1/4
3/4
The diagram above illustrates which of the following processes?
Crossing-over
Base pair subsitution
Duplication
Deletion
Imagine you are performing a cross involving garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds with yellow seeds? Yellow seed color is dominant over green.
100 percent yellow-green seeds
100 percent yellow seeds
50 percent yellow, 50 percent green seeds
25 percent green, 75 percent yellow
If blue and red true-breeding flowers are mated and result is all purple offspring, what inheritance pattern would this be indicative of?
Codominance
Dominance
Incomplete dominance
Multiple Alleles
Can a human male be a carrier of red-green color blindness?
Yes, males can be carriers of red-green color blindness, as color blindness is autosomal dominant
No, males cannot be the carriers of red-green color blindness, as color blindness is X-linked
No, males cannot be the carriers of red-green color blindness, as color blindness is Y-linked
Yes, males can be carriers of red-green color blindness, as color blindness is autosomal recessive
How and at what stage of meiosis do chromosomes undergo independent assortment?
Prophase I; pairing of homologous chromosomes
Telophase I; daughter cell seperation
Anaphase I; tetrad seperation
Metaphase I; metaphase alignment
True or false; The number of chromosomes is reduced from n to 2n during meiosis.
True!
False
P Generation -> _________ -> F2; Fill in the blank
P2
F1
O1
What is an example of a codominant trait in the human body?
Hair color
Skin Color
Blood Type
Color Blindess
Susy has blonde hair (hh). Her mother has blonde hair, and her father has brown hair (dominant trait). What are the genotypes of Molly's parents?
Mom: hh; Dad: HH
Mom: hh, Dad: Hh
Mom: hh, Dad; hh
Mom: HH, Dad: HH
In snapdragons come in three colors yellow (YY), blue (BB), and green (YB). What would be the chances of having green flowers if you crossed a blue snapdragon with a green snapdragon?
25 %
50%
75%
0%
If the parents are heterozygous for cystic fibrosis (Ff x Ff), then each offspring has a _____ chance of having cystic fibrosis.
2%
25%
50%
75%
E = unattached earlobes. e = attached earlobes. In the cross of Ee and Ee, the chance of a child with unattached earlobes is _____.
1/2
1/4
3/4
When Mendel crossed a true-breeding tall plant with a true-breeding short plant, the offspring were _____.
100% tall
50% tall, 50% short
100% medium
Which of the following characterizes autosomal recessive disorders?
Heterozygotes with normal phenotypes
Affected parents always having affected children
Affected individuals with homozygous dominant mates having unaffected children
All of the above
If the allele for red petals is not completely dominant to the allele for white petals, when a true-breeding plant with red petals is crossed with a true breeding plant with white petals, the offspring will ____.
all have red petals
all have pink petals
all have white petals
all have red and white petals
When individuals make an abnormal form of the extracellular matrix protein, fibrillin, which affects many other traits, the inheritance is the result of ______.
Codominance
multiple alleles
simple dominance
pleiotropy
Which of the following represents a heterozygous genotype?
TT
Tt
tt
tall
Which of the following is a phenotype?
Tt
Heterozygous
Short
T
If an individual with the dominant phenotype is crossed with an individual with the recessive phenotype and all the offspring have the dominant phenotype, it would be concluded that the individual with the dominant phenotype is _____.
homozygous dominant
heterozygous
homozygous recessive
If two flies heterozygous for wing length and body color are crossed, which of the following are possible results?
chance of L, long wings = ¾
chance of l, short wings = 1/2
Chance of G, grey body = ¼
All of these are true
If a man with blood type A has a child with blood type O, the father's genotype must be _____.
AA
AB
A0
OO
The appearance of both A and B types of glycoproteins on the red blood cells of the people with AB blood type is an example of _______.
Codominance
polygenic inheritance
autosomal recessiveness
incomplete dominance
Blood type in humans is controlled by _____ allele(s).
One
Two
Three
Four
More phenotypes than expected may result from polygenic inheritance because of _____.
multiple alleles
codominance
environmental effects
pleiotropy
Each gamete has only one allele for each trait because gametes are always _____.
Haploid
Diploid
Triploid
When an organism has two different alleles at a gene locus, it is referred to as _____.
homozygous recessive
homozygous dominant
heterozygous
The word __________ refers to the alleles an individual receives at fertilization.
Genotype
Phenotype
Karyotype
Lenotype
What type of inheritance does the pedigree to the right show?
Autosomal recessive
Sex-linked recessive
Autosomal dominant
Sex-linked dominant
How does independent assortment contribute to genetic variation?
It regulates how many paternal and maternal chromosomes a gamete receives.
It randomizes the number of maternal and paternal chromosomes a gamete receives
It ensures that only 1 copy of each chromosome is distributed to a gamete.
It produces new combinations of genes on a chromosome
If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.
Law of Dominance
Law of Segregation
Law of Independent Assortment
An organism is a hybrid genotype (Tt) but is appears tall instead of short.
Law of Dominance
Law of Segregation
Law of Independent Assortment
Person A is smart and has brown hair while Person B is also smart but has blonde hair.
Law of Dominance
Law of Segregation
Law of Independent Assortment
A child has type O blood, if mother has type A blood, what would the father's blood type be?
A,B, or O
AB or A
AB or B
O only
23. Gregor Mendel used the model of dominant and recessive forms of factors, or genes, to explain the results of his experiments on pea plants. For example, he proposed that tall plant height (T) was dominant over short height (t).
In one of Mendel’s experiments, a cross between two tall plants produced both tall and short offspring in a 3:1 ratio. Which conclusion about the parent plants is supported by Mendel’s model?
A Both parent plants were heterozygous (Tt) for height.
B Both parent plants were homozygous tall (TT).
C One parent plant was homozygous tall (TT), and the other parent was homozygous short (tt).
D One parent plant was homozygous tall (TT), and the other parent was heterozygous (Tt) for height.
Cancer is a disease in which cells divide rapidly and improperly. Which of the following events is often the cause of cancer?
A The immune system begins to attack normal, healthy cells of the body.
B Homeostasis fails in the blood, allowing acid levels to increase above normal tolerances.
C A nondisjunction error occurs during meiosis, causing cells to appear with an abnormal number of chromosomes.
D A mutation changes the regulation of the cell cycle in certain cells or tissues.
Certain genetic disorders are controlled by a recessive allele on the X chromosome.
Which gender, if any, is more likely to inherit this type of disorder?
A males, because they need only one copy of the allele to express the disorder
B females, because they could receive the allele from either parent
C females, because they need only one copy of the allele to express the disorder
D neither gender, because the allele is equally likely in both genders
