Quiz 10 Flashcards
People who have Androgen Insensitivity Syndrome (AIS) have the outward appearance of a normal female, but:
are incapable of having children and have XX chromosomes
are incapable of having children and have XY chromosomes
are capable of having children and have XX chromosomes
are capable of having children and have XY chromosomes
are capable of having children and have XX chromosomes
An individual who is heterozygous for a particular trait means that the person:
has a XX sex chromosome configuration
carries a XY sex chromosome configuration
has the same alleles (phenotypically) for a particular gene
has two different alleles (phenotypically) for a particular gene
will pass that trait on to all of his or her children
has two different alleles (phenotypically) for a particular gene
Mendel allowed the offspring from a monohybrid cross to self-fertilize. He summarized these results in what is now known as:
law of crossing over
law of mutation
law of segregation
law of independent assortment
law of segregation
Cancer causes death by:
chemicals released by the tumor
cancerous cells are abnormal and have negative genetic properties that cause death to normal cells
as cancer tumor(s) get larger, it (they) eventually block some vital organ from carrying out its normal function
as cancer tumor(s) get larger, it (they) eventually block some vital organ from carrying out its normal function
Describe how a cell “knows” how old it is. Include in your description the role of telomerase.
A cell can measure its lifespan through telomerase. Telomerase is the ends of the chromosome and with time that will decay and become smaller. When it finally decays the cell will die.
Assume that a particular character exhibits incomplete dominance (e.g. a red-flowered plant crossed with a white-flowered plant would yield plants with pink flowers the next generation). If you crossed two plants with pink flowers, which of the following results might you obtain from that cross if you counted a total of 100 plants?
All the resulting plants would have pink flowers
You counted 48 red and 52 pink-flowered plants
You counted 21 red, 54 pink and 25 white-flowered plants
You counted 51 red and 49 white-flowered plants
You counted 21 red, 54 pink and 25 white-flowered plants
Mendel’s paper on inheritance in peas stated: “Transitional forms were not observed in any experiment.” This means that:
Mendel did not find any evidence of incomplete dominance
Mendel determined that all the characters he studied occurred on different chromosomes
Mendel described polygenic traits
Mendel developed the chromosomal theory of inheritance
Mendel did not find any evidence of incomplete dominance
By performing dihybrid crosses, Mendel discovered the law of independent assortment. From the perspective of meiosis (which was unknown to Mendel), what does the law of independent assortment mean?
The genes for the two traits will assort independently because the genes are located on different chromosomes
The genes for the two traits will assort independently because the genes are located close together on the same chromosome
The genes for the two traits will assort independently because the genes are both dominant
The genes for the two traits will assort independently because the genes are located on different chromosomes
Which of the following statements is consistent with Mendel’s observation that: “particles of inheritance come in pairs that do not blend together”
genes are nucleotide sequences on DNA coding for proteins
gene alleles come in pairs on homologous chromosomes and form definite traits
chromosomes replicate to be passed on to each following generation
alleles on homologous chromosomes separate during meiosis I, ending in different gametes
gene alleles come in pairs on homologous chromosomes and form definite traits
Which of the following statements about cancer cells is NOT correct?
they interfere with a cell’s ability to control cell division
they acquire the ability to stimulate blood vessel growth
they exhibit contact inhibition
they are less “sticky” and are more likely to move to another location
they exhibit contact inhibition
Under natural conditions, the garden peas that Mendel studied typically were:
hybrids for one or more of the traits that he studied
either male or female plants
self-fertilizing
pollinated by honey bees
self-fertilizing
The resulting offspring from any true breeding monohybrid cross that Mendel studied were _________________________________ for the trait being studied.
100% were homozygous
100% were heterozygous
50% heterozygous and 50% were homozygous
75% homozygous and 25% were heterozygous
100% were heterozygous
In terms of phenotypes, a dihybrid cross should result in:
a 2:1 ratio phenotypic ratio
a 3:1 phenotypic ratio
a 9:3:3:1 phenotypic ratio
a bell-shaped curve
a 9:3:3:1 phenotypic ratio
