Upgrade to remove ads
Genetics Test 2
Terms in this set (50)
How many Barr bodies would be present in somatic cells of an individual of karyotype 48, XXYY?
Ectopic recombination between homologous repetitive regions on two different non-homologous chromosomes would result in...
Ectopic recombination between direct repeats on the same chromosome would result in...
A genotype at the sex chromosomes of XXY is known as...
Ectopic recombination between inverted repeats on the same chromosome would result in...
Why are mules sterile?
Most horse and donkey chromosomes are not homologous and don't pair together properly in meiosis
Compared to diploid plants, triploid plants have all of the following except
better pairing of chromosomes in meosis
Misalignment during synapsis followed by ectopic recombination between homologous regions on two different homologous chromosomes would result in
deletion and duplication
An event in which the centromeric regions of two nonhomologous acrocentric chromosomes become fused to form a single centromere is known as
Male ants and bees produce sperm by
A monoploid plant can be used to create a diploid plant by treatment with
Which chromosomal abnormality would be the most deleterious to human survival?
In an individual who is heterozygous for a sizable reciprocal translocation, the affected chromosomes will form a _____ while interacting at metaphase 1
Human color-blindness mutations result from
Unequal crossing over
A chromosome number that is an exact multiple of the haploid number
A chromosome in which the linear order of a group of genes is the reverse of the normal order has a(n)
During synapsis, if an individual is heterozygous for a sizable chromosomal inversion, the affected homologous chromosomes will form a _______ while they are paired
If polyploid species have complete sets of chromosomes from two or more different ancestral species, they are called
Much to the chagrin of Georgii Karpechenko, the hybrid plant brassicoraphanus had the leaves of a _________ and the roots of a ________
Monoploid plants are useful because...
No traits are masked by herterozygosity
Loss of function of p53
eliminates the DNA damage checkpoint
The progression from G2 to M (the G2/M transition) is stimulated by
Maturation promoting factor
Formation of the Philadelphia Chromosome results in the production of the chimeric fusion protein, Bcr-Abl. Bcr-Abl is
an overactive kinase
Defects in attachment of a chromosome to the spindle
Block activation of the anaphase promoting complex
The retinoblastoma protein controls
Transition from G1 to S phase
Even in the absence of damage, normal cells cease to divide in culture after about 50 doublings, a process called _____, whereas cancer cells in culture divide indefinitely
Cancer cells are characterized by
The chemotherapy drug taxol attacks cancer cells by preventing the breakdown of
the mitotic spindle
The function of Bax is to promote
Oncogenes are ______ mutations because they improperly enhance the expression of genes that promote cell proliferation or inhibit apoptosis
The function of Bcl2 is to inhibit Bax homodimer formation, thereby preventing apoptosis. Bcl2 is a
A large fraction of cases of Chronic Myeloid Leukemia are caused by this type of chromosomal abnormality, which creates the Philadelphia
The transcription factor that turns on expression of all genes required for DNA synthesis, allowing passage of the restriction point, is known as
Activation of CDK by a cyclin often results in
passing a cell cycle checkpoint
activation of transcription factors
expression of the next cyclin in line
After chromosome disjunction, cyclin B is marked for destruction by the
anaphase promoting complex
At the level of a single cell, a mutation in RB leading to retinoblastoma appears as ______, while at the level of the whole organism, inherited RB mutations appear as ______
Mdm2 protein binds to p53 transcription factor in order to
prevent its phosphorylation and degrade it
APC/C promotes anaphase by ubiquitinating this inhibitory protein, promoting its destruction
A key protein in the mammalian cell's response to stress in general and to DNA damage in particular, is called
Cells from cancerous tumors can sometimes enter blood vessels or lymphatic vessels, move to a new location, and continue to divide and create new tumors. What is this process called?
Mating of two organisms produces a 1:1 ratio of phenotypes in the progeny. The parental genotypes are
Aa x aa
You have a plant derived from a round, yellow pea and want to know its genotype. You testcross this plant and find 50% of the peas are round, yellow and 50% are round, green. What is the genotype of the parent plant? W=round w=wrinkled G=yellow g=green
In the formation of gametes, a pair of homologous genes will wind up such that each gamete contains only one homologous copy of each gene. This is a paraphrasing of...
Mendel's Law of Segregation
The interaction between nonallelic genes in their effects on a trait is called _____. This often results in one gene masking the expression of the other.
In families where both parents are heterozygous for a recessive trait, what is the probability of their having a child with the homozygous recessive genotype?
Diametrical traits that have two mutually exclusive versions with no intermediate phenotype, such as wrinkled vs. smooth peas, are often...
controlled by a single gene
Starting with a P1 cross between AA and aa, the proportion of heterozygotes in the F2 progeny will be
Mating an individual of dominant phenotype, unknown genotype with a recessive homozygote is called _____.
Mating of two organisms produces a 3:1 ratio of phenotypes in the progeny. The parental genotypes are
Aa x Aa
In dihybrid crosses, the ratio 9:3:3:1 indicates
THIS SET IS OFTEN IN FOLDERS WITH...
Genetics Test 3
Genetics Test 3 Multiple Choice
Genetics Exam 3
YOU MIGHT ALSO LIKE...
genetics test 2 from quizzes
genetics quiz 4 (ch5)
bio 211 exam 5
OTHER SETS BY THIS CREATOR
Pelvic inflammatory disease (PID)