How do you apply Mendel's law to solve this problem? You have three yellow, round peas, labeled I, II, and III, and each was grown into a plant and crossed to a plant grown from a green, wrinked pea. There were 100 peas issuing from each cross were sorted into phenotypic classes as shown below: I. 52 yellow, round
See the attached file. Below is a schematic of the lac operon: SHAPE * MERGEFORMAT A special class of mutants of E coli unable to utilize lactose as a carbon source were found to have mutations in the coding sequence for β-galactosidase (lacZ gene). They produce no β-galactosidase protein. Surprisingly, they fail to
1) Assume the gene for dimples, d, is recessive. Then assume that two individuals with the genotypes Dd and dd mate. Create a Punnett square for this mating and state the probability that their offspring will have dimples. 2) Briefly explain epistasis. 3) List the steps of mitosis and briefly describe what happens in each.
can any one do it in an hour..i need to learn... suggest credits 4..A prison guard states that an inmate threw and unknown liquid on him. This is a felony charge of harassment. In order for this charge to be prosecuted, you must show a bodily fluid was thrown on the guard. The shirt smells like vomit. How would you proceed?
Using Mendel's laws, describe the phenotypic and genotypic ratios for the F2 generation if pea plants with restricted yellow pods are crossed with restricted yellow pods and crossed with true-breeding inflated green pods in the original cross and then the F1 generation is crossed. I do not understand this at all. Please explain.
Genetics plays a great part in every day life these days. From solving crimes to determining the desirable properties of livestock and crops - science has made many advances. These days biotechnology enables us to have more control than was previously though possible. What do you think - should we be able to control the characte
Both of Susie's parents died from breast cancer. Susie tested positive for the BRCA1 gene, the BRCA2 gene, and HPV; however, she does not have any cancer cells in her body or any signs or symptoms. Susie just called you and told you that she has decided to undergo a double radical mastectomy to remove both of her breasts and a c
In a human population of 1000 people at a blood locus there are two alleles M and N. The observed genotype frequencies at this locus are f(MM) = 0.26, f(MN) = 0.35, and f(NN) = 0.39. a. What is the frequency of each allele in this population? Do not assume Hardy-Weinberg equilibrium. b. Based on the answer above calculate
1. Give one reason why genes may not follow Mendel's second principle. Explain clearly. 2. How can viruses cause cancer? a) Because they produce oxygen b) Because they carry toxins c) Because they always undergo the lytic cyle d) Because they can cause insertional mutagenesis e) All of the above
1. Mendel did not see the phenomenon of gene linkage in his experiment because: a) He used plants in his crosses b) He studied alleles/genes that were far apart on the same chromosome c) He studied alleles/genes that were in coupling d) He studied alleles/genes that were dominant e) All of the above 2. Give an example
1. Eye color is an X-linked gene and red is dominant to white in Drosophila. If I mate a red eyed male with a white eyed female and I mate a white eyed male with a pure breeding red eyed female, the progeny from both crosses will be the same. A. True B. False 2. Mary met her partner Bobby at a support group for families
Pros and Cons of GMO Technology Pros: Genetically Modified Organisms(GMO) can benefit and contribute to medicine in many ways. For example, there are genetically modified microorganisms that can make human insulin to treat diabetic patients. (3) There are genetically modified bacteria that can be used to clean toxic fuel an
Describe the transcriptional control of the Lactose Operon.
The lac operon encodes a set of genes for the metabolism of lactose. There are three genes encode by the lac operon: lac Z gene, lac Y gene, and lac A gene. (1 ) The lac Z gene translate into B-galactosidase. (1) The lac Y gene translate into lactose permease. (1) The lac A gene translate into lactose transacetylase. (1) T
Fill-in each blank with the appropriate word(s) to complete the sentences. There are two major categories of cells. These categories are _______________ cells, which include bacteria, and __________________, which include fungi. ____________________ is the term that describes an organism's ability to maintain a stable intern
What is the significance of a cDNA library? Why do scientist have to synthesize cDNA from cells and how do cDNA get generated? What is a cDNA library? What is a cDNA library used for? What is the biological important of studying cDNA? What is the difference between cDNA and genomic DNA? What is needed in a gene expression
1. What happens when you step on a nail? 2. What happens when you breathe in a virus? 3. If female vampires are venomous, male vampires are venomous, and Nahuel (a Male hybrid vampire) is venomous, why are all known female vampire hybrids not venomous? Is being venomous a sex-linked trait or a coincidence based on other chromo
1. How do the base pairing relationships of DNA bases account for the uniform width of the double helix? 2. Look at Figure 13.13a-c on page 552 on the textbook. What enables the two DNA polymerase III molecules to act on replication as a unit (i.e., simultaneously replicating the leading and lagging strands) even though they
An orchid breeder is interested in increasing the number of stems and the length of stems that can be produced by an orchid plant. She finds a segregating population that contains a wide range of both stem number (Ranging from 2 to15 stems per plant) and stem length (Ranging from 2 to 7 inches in length). She selected plants fro
The following list are several types of mutations that could occur in a proto-oncogene or a tumor-suppressor gene. Some of these mutations may increase the rate of progression through the cell cycle (Thus promoting cancer), whereas others would either decrease the rate or have no effect. For each of the below scenarios, writ
The Ames test is used to determine if an external agent (such as a chemical) can act as a mutagen. In this test, several different his- strains of Salmonella typhimurium are used. Each strain contains a different class of mutation in the his gene. Each mutant is exposed to the chemical to determine if the chemical can revert the
Tay-Sachs disease is a fatal, recessively heritable, delayed onset illness that develops during infancy. In a certain community, a widespread mutant allele for Tay-Sachs disease removes a Hind III restriction site in the gene sequence. A probe is available for this region, with the following homology:
The autoradiogram below shows the genomic DNA fragments produced by digesting genomic DNA with the restriction enzyme Mst II and probing the membrane with a DNA probe specific for the beta globin chain gene of hemoglobin. The parents are C and D, and the children are E and F. Hb S indicates a mutated gene leading to the sickle
A human gene was initially identified as having three exons and two introns. The exons are 456, 224, and 524 bp, while the introns are 2.3 kb and 4.6 kb. (a) Draw the gene, showing promoter, 5' UTR, 3' UTR, introns, exons. (b) Surprisingly, it is found that this gene encodes not one but two mRNAs that have only 224 nucleoti
Suggest the likely gene function mutated in each of the following defects during replication in E. coli (a) Accumulation of Okazaki fragments. (b) The presence of RNA in newly synthesized DNA strand. (c) Many mismatched base pairs. (d) DNA replication does not initiate
You have isolated four different mutants unable to synthesize compound E required for growth. You know that compounds A through D are involved in the biosynthetic pathway that produces compound E, but you do not know the order in which they are synthesized by a wild-type cell. You supplement the growth of each of the 4 mutant
The following table contains statements pertaining to Hfr, F+, F', and/or F- strains of bacteria. Indicate in respective boxes if the statements apply to each category by putting Hfr, F+, F', F- beside the statement. a) Contains genes that regulate conjugation and the transfe
Vanessa has obtained two true-breeding strains of mice, each homozygous for an independently discovered recessive mutation that prevents the formation of hair on the body. The discoverer of one of the mutant strains calls his mutation "naked," and the other researcher calls her strain "hairless." To determine whether the two
Genetically speaking, brown eyes (B-) are dominant to blue eyes (bb). However, an individual can wear colored contacts in order to change his or her eye phenotype. Suppose a man with blue eyes (bb) marries a woman who appears to have blue eyes and together they have five children. Listed below are three possible outcomes. Gi
Four patterns of inheritance and four pedigrees are shown below. Assume that individuals marrying into the family are homozygous for the wild-type allele. Match each of the inheritance patterns with a pedigree. (a) Autosomal recessive _________ (b) Y-linked trait _________ (c) X-linked recessive _________ (d) Autosomal domi