unit 8 genetics
HW problem
1,133
Chickens have fleshy growth on top of the head called a comb. An autosomal trait called rose comb is cominan to a trait called a single comb. An unbarred male heterozygous for the rose-comb trait is crossed with a barred female with a single comb. What proportion of of the resulting progeny are expected to be barred males with a single comb?
1/4 or .25
the probability that an individual III-5 will develop Friedrich's ataxia is closest to which of the following?
25%
One of the affected males from the third generation has a child with a female who is a carrier. For the pedigree shown above, which of the following best expresses the probability that the couple's first son will be affected with the disorder?
50%
one of the affected males from the third generation has a child with a female who is a carrier. For the pedigree shown above, which of the following expresses the probability that couples first son will be affected with the disorder?
50%
The HBA allele which causes Sickle cell anemia...
5k' CUG ACU CCU GUG GAG AAG UCU 3'
the blue flowered african violet plant organizes its DNA into chromosomes which has two alleles for a trait.....
Can conclude that pink flower color color exhibited a trair recessive to blue flower color.
Which of the following best describes the results seen in figure 2
Individuals III-2 and III-3 carry two different alleles of the FXN gene, a mutant allele and a wild type allele. Individual IV-1 inherited two copies of the mutant allele
have the same phenotype as one of the two plants in the parental cross, but relatively few have the same phenotype as the F1 offspring. Which of the following best explains the observation?
Recombination between the leaf-shape and flower-color genes resulted in chromosomes carrying dominant allele of both genes
which of the following represents a cross between a white eyed female and a red eyed male
Rr XtXt x Rr XTY
TSACS is a rare autosomial recessive gene. Based on this information presented, which of the following best explains the difference of phenotypes between TSACS carriers and the homozygous?
Tay-sachs carriers synthesize an essential enzyme that homozygous recessive individuals do not.
Which of the following best describes the most likely effort of formation of a triplex DNA structure (Figure 3) on the synthesis of the frataxin protein?
The binding of the ribosome to the mRNA is prevented, resulting ina decrease in frataxin translation
A researcher claims that TSAC carriers are protected against the infectious disease tuberculosis. Which of the following about annual incidence of tuberculosis and subpopulation two could best be used to support the researchers claim?
The incidence of tuberculosis in subpopulation II is lower than the incidence of tuberculosis in the general population
Based on the data in figure 1, which of the following describes the inheritence pattern of Friedreich Ataxia?
autosomal recessive
which of the following pedigrees most accurately represents a family history of TSACS?
b
Which of the following conclusions is best supported by the data
bonobos are more closely related to humans than gorillas
Most direct evidence that flower color is due primarily to soil conditions?
growing cuttings from the same hydrangea macrophylla plant under controlled conditions that vary only with regard to soil pH
based on the data in figure 1 which of the following best describes the genotypes of individual family members in the pedigree?
healthy individuals may posses one mutant allele (hbs) of the hemoglobin beta gene
Which of the following potential therapies would be most effective at preventing the expression of an oncogene?
introducing a chemical that binds to transcription factors associated with the oncogenes promoter
The pedigree below shows the inheritence of a dominant allele of a gene in a family over several generations. Circles represent females and squares represent males. Shaded symbols indicate individuals carrying the allele. The pedigree suggests that the gene is on a nuclear chromosome, and not on a mitochindrial DNA because...
maternal mitochondrial mutations are inherited by all of a mothers offspring.
gregor mendels pioneering genetic experiments with pea plants occured before the discovery of the structure and function.
most offspring of a given cross have a combination of traits that is identical to that of either one parent or the other
In which population is the recessive allele highest?
pop 3
which of the following is an ethical question about TSACS diseas and cannot be answered using the scientific method?
should genetic testing be required before individuals in sub population three are advised to not having children?
Figure 1 shows the inhertence of a particular genetic condition in three generations of one family. Which of the following best explains the observed pattern of inheretence ?
the condition is passed from mothers to offspring via a mitochondrial gene
....
the genotype of the plant with yellow round seeds will be YYRR and produce YR gametes while the genotype of the plant with wrinkled green seeds will be yyrr and produce yr gametes
the restriction endonuclease Mst II recognizes the sequence 5' CCT(N)AG (where N = any nucleotide) ...
the hba dna contains a recognition site for the MST II restriction enzyme
which of the following is the most likely affect of the mutations associated with the non taster TAS2R38 gene expression?
the mutations change the primary structure of the encoded receptor protein
