Suppose meiosis occurs in a meiocyte in an anther of a plant in which 2n=6. What proportion of pollen grains will receive a complete set of centromeres from the plant's maternal parent? (Think of the maternal centromeres as being blue and the paternal ones as being red).
If I were hired as a genetic counselor to advise a couple about the odds of the couple having a baby with a genetic disorder and I wanted to order lab tests to be done on the pregnant mother to determine if the baby has a genetic disorder (amniocentesis)-what kind of test would be done? How would the test determine if the baby h
1. Why are these macromolecules (DNA and RNA) called nucleic ACIDS if they are made up of BASES? 2.Discuss how the different FUNCTIONS of DNA and PROTEIN result in Different STRUCTURES. (or visa versa) 3. What gives DNA its helical nature? 4.Why does RNA use uracil instead of thymine 5.Why does RNA use ribose an
1. During the transcription of a certain protein, an extra cytosine was placed into a gene region, throwing off the correct amino acid sequence. What type of mutation occurred? A. Transposon B. Insertion C. Base-pair substitution D. Deletion 2. DNA requires which of the following? A. Sunlight C. Protein synthase B.
What are some possible ethical issues regarding genetics and development that might arise in the future? How much stimulation should a caregiver give to infants? Why? Is it possible for a child to be given too much sensory stimulation? Why or why not?
Skin Disorders 1. Compare the mechanisms and possible causes of allergic and irritant contact dermatitis. 2. Prepare a list of contagious skin disorders. 3. Suggest a preventative measure that could reduce the risk of skin cancer. 4. Explain why allergic responses tend to recur. Musculoskeletal Disorders 5a.
How is information about DNA structure used as a taxonomic tool? How does the morphological species concept differ from that of a phylogenetic species. How are DNA - DNA hybridization results used to classify organisms? What have "molecular clocks" to do with classification of organisms? Classify your self from kingd
1. In the "DNA clock", some nucleotide changes cause amino acid substitutions in the encoded protein (nonsynonymous changes), and others do not (synonymous changes). In a comparison of rodent and human genes, rodents were found to accumulate synonymous changes 2.0 times faster than humans and nonsynonymous substitutions 1.3 time
1. Explain why a well-adapted organism synthesizes only the proteins necessary at any particular moment. 2. When radioactive uracil is injected into the developing larvae of Drosophilia, only certain regions of the chromosomes in certain tissues contain radioactive uracil. Explain this observation.
1. If farmers continue to use large quantities of chemicals to control insect pests and weeds what problem (from an evolutionary perspective) are they likely to encounter? 2. In terms of gene pools, what is a major potential consequence of isolating wildlife in reserves. 3.Tay-Sachs disease, which is inherited as a Men
What are the expected phenotypic ratios for a monohybrid cross? For a dihybrid cross? For a sex-linked trait? See attached file for full problem description.
Compare Mendel's laws of heredity with the chromosomal basis of heredity. Reflect on why comparing Mendel's work with the chromosomal basis of heredity suggests that the work of science is cumulative.
A baby boy with Klinefelter's syndrome is born to a mother who is phenotypically normal and a father who has the X-linked skin condition called anhidrotic ectodermal dyplasia (if you don't know this condition, research it). The mother's skin is completely normal with no signs of skin abnormality. In contrast, her son has patches
1. Write a report, providing a brief overview of the debate surrounding genetic food modification. 2. Utilizing information from the Internet, include in the report the process by which transgenic organisms are created. In your description, address the following questions: ? How is this process similar to the more traditiona
You are trying to map a human gene thought to be involved in cat allergies. Because you know this gene is on chromosome 20, you decide to examine the linkage of several SNPs located on chromosome 20 with respect to the gene involved in cat allergies. You have obtained DNA from 10 individuals and know whether they are allergi
See attached file for full problem description.
Describe a physical trait(s) of trait theories associated with criminal behavior, and give an example of a recent criminal who exhibits this trait. might this crime be prevented in future circumstances. Supplemented with an article that highlights the relationship between genes, environmental and criminal behavior.
1. Alternate forms of a gene that govern the expression of the same trait and that occur at the same positions on homologous chromosomes are called: a. Chromatids. b. mRNA. c. Gametes. d. Alleles. e. Autosomes. 2. In Mendel's garden peas, the yellow color is dominant to the green. Additionally
Why is it accurate to think of each human being as the owner of a library of ancient information?
How would DNA translocation produce cancer?
In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild type F1 female progeny were mated to fully homozygous (mutant) males and the following progeny (1000 total) were observed.
Three loci, mitochondrial malate dehydrogenase that forms a and b (MDHa, MDHb), glucouronidase that has forms 1 and 2 (GUS1, GUS2), and a histone gene that has + and - variants(H+, H-), are located on chromosome #7 in humans. Assume that the MDH locus is at position 35, GUS at position 45, and H at position 75. A female whose
Assume that investigators crossed a strain of flies carrying the dominant eye mutation Lobe on the second chromosome with a strain homozygous for the second chromosome recessive mutations smooth abdomen and straw body. The F1 Lobe females were then backcrossed with homozygous smooth abdomen, straw body males and the following p
Assume that the genes for tan body and bare wings are 15 map units apart on chromosome II in Drosophila. Assume also that a tan-bodied, bare-winged female was mated to a wild type male and the resulting F1 phenotypically wild type females were mated to tan-bodied, bare- winged males. Of 1000 offspring, what would be the expe
1. A short-tailed mutant of mouse was discovered. Multiple crosses of this mouse to normal mice produced 27 normal, long-tailed mice and 25 short-tailed mice. A series of crosses among short tailed mice were made and 21 short-tailed mice and 11 long-tailed mice were produced. Determine which phenotype is dominant and explain
1. G6PD is an enzyme found in human white blood cells. It is made by a gene that has 2 alleles, A and B. In females, cells either make the A type or the B type, but never both. This is very different from most other enzymes, where all cells in a heterozygote make both types of enzyme. What is the most reasonable explanation f
1. Two black guinea pigs were mated repeatedly over several years. They produced 29 black progeny and 9 white progeny. Explain these results, giving the genotypes of parents and progeny. 2. In horses, black is dependent on a dominant gene (B) and chestnut upon its recessive allele (b). The trotting gait is due to a dominan
In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the dominant allele and e indicates the recessive allele. The cross between a male wild type fruit fly and a female white-eyed fruit fly produced the following offspring. Wild-type Wild-type White-eyed White-eyed Brown-eyed male f
How does one's food pattern over time contribute to the development of diseases? What do you think is the interplay between genetics and eating habits? How early should one be concerned with preventing diseases? Infancy?
Using the table below, build a genetic distance matrix which gives the total number of genetic differences between pairs of unique haplotypes in the sample. The first box is filled in for you, by way of an example. Haplotypes 1 2 3 4 5 1 -- 2 2 -- 3 -- 4 -- 5