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WorksheetsBIOL 121 CH 14/15
Total questions: 28
Worksheet time: 2hrs 11mins
The difference between a character and a trait is....
They are the same
Character is a heritable feature and trait is the variety within the character
Trait is a heritable feature and character is the variety within the character
They are unrelated
What other organism would have been a good model for Gregor Mendel to use in his research?
Human
Mouse
Elephant
E. coli
The result of a cross between two true breeding parents are 100%...
No fertilization will occur
More true breeding offspring
Homozygous
Hybrid (heterozygous)
Which of the following was NOT a main theme in Mendel's model?
The inheritable material is DNA
Alternative versions of genes account for variations
For each character, an organism inherits two alleles, one for each parent.
If 2 alleles at a locus differ, one will be dominant and control the organism's appearance and the other will be recessive.
The Law of Segregation
An organism with two identical alleles is _______ and an organism with two different alleles is ______.
heterozygous....heterozygous.
homozygous....homozygous.
Homozygous.....heterozygous.
heterozygous.....homozygous.
A purple pea plant is homozygous for the recessive allele for color. What is the plants genotype?
cc
CC
Cc
Purple
A purple pea plant is homozygous for the recessive allele for color. What is the plants phenotype?
Purple
complete dominant
Cc
cc
A white mouse is crossed with a black mouse and the resulting litter are all brown. This is an example of what?
Complete Dominance
Polydactyly
Incomplete dominance
Pleiotropy
A mystery disease symptoms are weak respiratory function, low sperm motility, and very salty sweat. All these symptoms are controlled by a single gene. This is an example of what?
Pleiotropy
Complete dominance
Epistasis
sickle-cell disease
Which is an example of polygenic inheritance?
A pink flower is crossed with a white flower and the resulting flowers are all pink.
A white curly haired hamster mates with a brown straight haired hamster. The resulting litter are all white straight haired.
Two Japanese parents have three children and they all have albinism.
A 5ft woman has children with a 6ft man and the resulting children are 5ft 3in, 6ft 1in, and 5ft 7in.
How is a pedigree useful?
Determining how diseases are inherited through a family.
The probability of having identical twins
The likelihood of having more than 4 children
Determining how personalities within a family interact.
How did Mendel conclude his experiments?
Using PCR to determine the genes expressed in pea plants
Collecting data based on observations of pea plant crosses.
Using crossing techniques to determine inheritance patterns of genes through multiple species of mammals.
all of the above
The law of segregation and law of independent assortment are occur when?
Mitosis
Meiosis I only
Meiosis II only
Meiosis I and II
Which trait is NOT true of model organisms Drosophila melanogaster.
Produce many offspring.
Only four unique chromosomes.
Able to fly
Can be bred every 2 weeks
What does it mean to have a "sex-linked" gene mutation?
Gene determines if you are male or female
Gene mutation is located on chromosome X or Y
Gene mutation causes disease of the sex organs
Gene mutation only occurs in one sex
Why is recessive X-linked trait expression more common in males?
the Y chromosome only contains recessive genes.
They only have one X chromosome, if it contains the recessive trait they will express it.
In males, both the X chromosomes are genetically identical.
The Y chromosome only turns on recessive genes on the X chromosome.
Cells of female mammals contain two X chromosome. However, on of the X chromosomes are turned off. What is this an example of?
Epistasis
X-linked genes
sex chromosome evolution
Barr body
A red eyed black bodied fruit fly is crossed with a white eyed gray bodied fruit fly. The half of the resulting offspring do not look like either parents (red eyed gray bodied). What is this an example of?
Genetic recombination
Incomplete dominance
Linked genes
Epistasis
Gene A and gene D are on polar ends of a chromosome. These genes are likely to be....
linked
inherited together
separated via cross over.
mutated
Which is the following is an example of non-disjunction?
gametes with no chromosomes
chromosomes are equally separated in meiosis.
gametes with too many/too little chromosomes.
two different daughter cells are produced from mitosis.
Triploidy is a disease where a diploid egg is fertilized by a haploid sperm. This is an example of..
Down syndrome
Monosomic
Polyploidy
Trisomic
During meiosis II sister chromatids are not separated. The resulting eggs are fertilized by a normal haploid sperm. This is an example of...
Linked genes
GMO
tetraploidy
Aneuploidy
A mutation occurs on chromosome 3 that results in the removal of a portion of the chromosome. This is an example of...
translocation
viral infection
apoptosis
deletion
A gene that codes of protein ATP synthase is normally found on chromosome 17. It is found on chromosome 2 in one person. This is an example of...
Translocation
Inversion
Duplication
Deletion
Two heterozygous brown hair brown eyed parents have children. What is the phenotypic ratio of this cross?
10 non brown/ non brown : 6 brown/ brown
9 non brown/ non brown : 3 brown/non brown : 3 non brown/brown : 1 brown/ brown.
8 brown/ brown : 8 non brown/ non brown
9 brown/brown : 3 brown/non brown : 3 non brown/brown : 1 non brown/ non brown.
How many sex chromosomes do humans have?
2 in both sexes
1 in males, 2 in females
4 in both sexes
2 in males, 1 in females
How is the recombination frequency between genes calculated?
How close the chromosomes are in a karyotype.
Determining if the genes are linked. If linked there is 0% frequency, if not linked their is 100% frequency of recombination.
Measuring the distance between genes. 1 mu = 10 % recombination frequency.
Measuring the distance between genes. 1 mu = 1% recombination frequency.
Which of the following is an example of an aneuploidy of the sex chromosomes?
XXY
XYY
XXX
All of the above
