genetics final exam
questions with correct
answers.
the enzyme capable of synthesizing RNA from DNA is - correct ans:RNA
polymerase
ribosomes are involved in the process of - correct ans:translation of RNA to
protein
what is the maximum number of alleles of a single gene that a haploid
organism can have? - correct ans:one
Diploid eukaryotic cells have two haploid sets of chromosomes, one
distributed by one parent, and the other one distributed by the other parent -
correct ans:true
Suppose the G allele is dominant while the g allele is recessive. An organism
with the genotype GG or Gg will display the G+ phenotype, while an
organism with the gg genotype will display the G- phenotype. What would be
the predicted phenotypic ratio for offspring if you mated Gg x Gg? - correct
ans:3G+:1G-
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If a homozygous yellow wrinkled plant is mated with a
plant that is heterozygous for both traits, what fraction of the offspring can
be expected to be simultaneously green and wrinkled? - correct ans:0
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If a green, homozygous smooth plant is mated with a
,plant that is heterozygous for both traits, what fraction of the offspring can
be expected to be both yellow and smooth? - correct ans:1/2
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If two heterozygous yellow, smooth plants are mated
together, what fraction of the offspring can be expected to be both green
and smooth? - correct ans:3/16
Assume that in pea plants yellow, smooth, and tall are dominant and
unlinked (independent) traits. If two heterozygous yellow, smooth, and tall
plants are mated, what fraction of the offspring can be expected to be
simultaneously green, wrinkled, and tall? - correct ans:3/64
Assume that in moles a single gene controls color. Moles are either tan or
gray. When a tan mole mates with another tan mole, all the offspring are tan.
When a gray mole mates with either another gray mole or a tan mole, some
of the litters are all gray and some litters are mixed, having gray and tan
moles. Given these data, choose the most likely statement. - correct ans:the
gray allele is dominant, and all the tan moles are homozygous
if two heterozygotes have 3 segregating gene pairs, how many genotypic
and phenotypic classes will be observed? - correct ans:27 and 8
If a dice has 6 faces, what is the probability you will roll either a 2 or a 4 or a
6? - correct ans:1/2
Human males and fruit fly males are said to be ____ for genes on the X
chromosome. - correct ans:hemizygous
in humans the heterogametic sex is - correct ans:males(XY)
in humans the homogametic sex is - correct ans:females(XX)
,what is the sex-determining system in humans? - correct ans:XY system
which of the following is true about the Syr gene in humans? - correct ans:it
is present on the y chromosome
what is the function of the SYR gene in humans? - correct ans:it determines
the biological maleness
which of the following karyotypes represents a female bird? - correct ans:ZW
diploid cells of a typical mammalian female would contain ____ barr bodies
per cell? - correct ans:1
sex limited and sex influences traits are caused by genes that are located on
the sex chromosomes? - correct ans:false
Autosomal traits that appear only in one of the biological sexes are called -
correct ans:sex limited
assume that red-green color blindness is a recessive sex limited ( x linked)
trait. A normal vision male mate with a color blind female. what can we
expect their offspring to be? - correct ans:all the males and no females will
be color blind
x-linked traits are only expressed in males, not females - correct ans:false
could this trait be autosomal recessive? - correct ans:yes
, could this trait be autosomal dominant? - correct ans:yes
could this trait be autosomal recessive? - correct ans:no
could this trait be X-linked recessive? - correct ans:yes
could this trait be x-linked recessive? - correct ans:no
could this trait be x-linked recessive? - correct ans:no
could this trait be x-linked dominant? - correct ans:yes
could this trait be x-linked dominant? - correct ans:no
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait must be dominant
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait could be either
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait is recessive
your parents are healthy, but they both are carriers for a recessive trait. you
are healthy too. what is the probability that you are not a carrier for that
trait? - correct ans:1/3
questions with correct
answers.
the enzyme capable of synthesizing RNA from DNA is - correct ans:RNA
polymerase
ribosomes are involved in the process of - correct ans:translation of RNA to
protein
what is the maximum number of alleles of a single gene that a haploid
organism can have? - correct ans:one
Diploid eukaryotic cells have two haploid sets of chromosomes, one
distributed by one parent, and the other one distributed by the other parent -
correct ans:true
Suppose the G allele is dominant while the g allele is recessive. An organism
with the genotype GG or Gg will display the G+ phenotype, while an
organism with the gg genotype will display the G- phenotype. What would be
the predicted phenotypic ratio for offspring if you mated Gg x Gg? - correct
ans:3G+:1G-
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If a homozygous yellow wrinkled plant is mated with a
plant that is heterozygous for both traits, what fraction of the offspring can
be expected to be simultaneously green and wrinkled? - correct ans:0
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If a green, homozygous smooth plant is mated with a
,plant that is heterozygous for both traits, what fraction of the offspring can
be expected to be both yellow and smooth? - correct ans:1/2
Assume that in pea plants yellow and smooth are dominant and unlinked
(independent) traits. If two heterozygous yellow, smooth plants are mated
together, what fraction of the offspring can be expected to be both green
and smooth? - correct ans:3/16
Assume that in pea plants yellow, smooth, and tall are dominant and
unlinked (independent) traits. If two heterozygous yellow, smooth, and tall
plants are mated, what fraction of the offspring can be expected to be
simultaneously green, wrinkled, and tall? - correct ans:3/64
Assume that in moles a single gene controls color. Moles are either tan or
gray. When a tan mole mates with another tan mole, all the offspring are tan.
When a gray mole mates with either another gray mole or a tan mole, some
of the litters are all gray and some litters are mixed, having gray and tan
moles. Given these data, choose the most likely statement. - correct ans:the
gray allele is dominant, and all the tan moles are homozygous
if two heterozygotes have 3 segregating gene pairs, how many genotypic
and phenotypic classes will be observed? - correct ans:27 and 8
If a dice has 6 faces, what is the probability you will roll either a 2 or a 4 or a
6? - correct ans:1/2
Human males and fruit fly males are said to be ____ for genes on the X
chromosome. - correct ans:hemizygous
in humans the heterogametic sex is - correct ans:males(XY)
in humans the homogametic sex is - correct ans:females(XX)
,what is the sex-determining system in humans? - correct ans:XY system
which of the following is true about the Syr gene in humans? - correct ans:it
is present on the y chromosome
what is the function of the SYR gene in humans? - correct ans:it determines
the biological maleness
which of the following karyotypes represents a female bird? - correct ans:ZW
diploid cells of a typical mammalian female would contain ____ barr bodies
per cell? - correct ans:1
sex limited and sex influences traits are caused by genes that are located on
the sex chromosomes? - correct ans:false
Autosomal traits that appear only in one of the biological sexes are called -
correct ans:sex limited
assume that red-green color blindness is a recessive sex limited ( x linked)
trait. A normal vision male mate with a color blind female. what can we
expect their offspring to be? - correct ans:all the males and no females will
be color blind
x-linked traits are only expressed in males, not females - correct ans:false
could this trait be autosomal recessive? - correct ans:yes
, could this trait be autosomal dominant? - correct ans:yes
could this trait be autosomal recessive? - correct ans:no
could this trait be X-linked recessive? - correct ans:yes
could this trait be x-linked recessive? - correct ans:no
could this trait be x-linked recessive? - correct ans:no
could this trait be x-linked dominant? - correct ans:yes
could this trait be x-linked dominant? - correct ans:no
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait must be dominant
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait could be either
which statement is most accurate for the trait shown in the pedigree? -
correct ans:the trait is recessive
your parents are healthy, but they both are carriers for a recessive trait. you
are healthy too. what is the probability that you are not a carrier for that
trait? - correct ans:1/3
