Think you’ve got your head wrapped around Genetics? Put your knowledge to
the test. Good luck — the Stickman is counting on you!
Q. Human, mice and fly males are _______ for loci on the X chromosome.
Homozygous
Heterozygous
Hemizygous
Homogametic
Heterogametic
Q. A mutant phenotype refers to
a common phenotype in a population
an abnormal, degenerative phenotype
a rare phenotype in a population
a phenotype determined by a recessive allele
a strange phenotype
Q. In a sci-fi movie, a telekinetic man has all telekinetic daughters but sons with no telekinetic abilities. Their mother is just a regular human. What is a likely genetic basis for telekinesis in this plot?
X-linked dominant
X-linked recessive
Autosomal recessive
Mitochondrial
Not enough information provided
Q. Coat color in creature X is determined by a single locus. When a true breeding black creature X and a true breeding yellow creature Y are crossed, all the resulting offspring are tan. What type of allelic relationship does this example represent?
Epistasis
Incomplete dominance
Pleiotropy
Independent segregation
Genetic linkage
Q. If the tan creatures Z are interbred, what are the resulting phenotypic frequencies in the next generation?
50% black and 50% yellow
100% tan
33.3% black, 33.3% yellow, and 33.3% tan
25% black, 50% tan, and 25% yellow
100% black
Q. Linked genes tend to be inherited together because
they are epistatic
they are located close together on the same chromosome
they are at the same locus
they have a high penetrance
they are pleiotropic
Q. In the fruit fly Drosophila melanogaster, a mutation in the wingless gene produces flies missing wings, and the mutant allele is recessive. What is the most likely outcome of a cross between two heterozygote flies?
46 winged and 54 wingless
9 winged and 91 wingless
74 winged and 26 wingless
1 winged and 99 wingless
30 winged, 24 with intermediate wings, and 46 wingless
Q. Continuous traits
show a continuous distribution
were discovered by Mendel
are affected by multiple genes and the environment
are option 1 and 3
are none of the above
Q. A floriculturist is interested in generating roses with larger petals. He measures the following components for petal radius in a population of plants from his farm.
Additive genetic variance (VA): 5.1
Dominance genetic variance (VD): 1.1
Interaction genetic variance (VI): 0.5
Environmental variance (VE): 3.0
Genetic-environmental variance (VGE): 0.1
What is the phenotypic variance?
8.3
9.8
5.0
0
1.0
Q. What is the broad sense heritability?
0.1
0.45
0.68
6.7
1.0
Q. What is the narrow sense heritability?
5.1
0.52
0.99
0.1
1.0