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Genetics

Probability - A woman of blood type A and normal color vision...

A woman of blood type A and normal color vision produced five children as follows: a)male, blood type A, color blind b)male, blood type O, color blind c)female, type A, color blind d)female, type B, normal vision e)female, type A, normal vision of the two men that mated with this woman at different times, man #1 is blo

Punnett Squares and Pedigrees

(See attached file for full problem description and diagrams) --- Consider the following five family pedigrees below chosen for study because: 1) two rare conditions are segregating; scaly elbows (X symbol) and a liver disease (filled symbol). 2) the families are large in size. a) What is the mode of inheritance of scaly el

Expected genotype and phenotype ratios

Assume a gene for warped wings (W) in Drosophila that is dominant and X-linked. give the expected genotype ratios and phenotype ratios for the progeny of each of the following crosses: a)warped male x normal female b)warped heterozygous female x normal male c)warped heterozygous female x warped male

Offspring phenotypes

In guinea pigs, dark coat color (C) is dominant over albino (c), and short hair (S) is dominant over long hair (s). The genes for these two traits show independent assortment. By evaluating the possible crosses, determine the most probable genotypes for the parents of each of these seven crosses: parental phenotypes

Corn Kernel Genotypes and Phenotypes

A) While examining an ear of corn, you notice that the kernels in the ear display two apparent phenotypes; yellow and white. inspired by your understanding that these represent different alleles of a single gene, you count the kernels of each type and you asses 347 yellow (Y) kernels and 111 white (y) kernels. if this ear of c

Probability

In humans, the ability to taste PTC is inherited as a dominant gene (T; Taster). in a marriage between two heterozygous tasters (Tt): a) what is the probability of 3 taster children? b)what is the probability of 3 taster girls? c)if they have 5 children, what is the probability that the first 3 will be tasters and the last

% of traits passed to progeny

The average pea pod contains about 7 peas. The gene for smooth peas is dominant over the gene for wrinkled peas. If heterozygous pea pods grown from smooth peas are self-fertilized and all of the pods have 7 peas, what percentage of the pods will have: a) all smooth peas? b) 5 smooth and 2 wrinkled peas?

Genetics

Describe a single gene inherited disease, a multi-factorial (multiple genes and environmental factors) disease, and non-inherited genetic disease. Use Down syndrome, sickle-cell anemia, asthma and breast cancer as examples

Genetics

What is parental imprinting? What is the result of replacing the sperm nucleus of a fertilized egg with another egg nucleus?

Genetic probabilities

49% of the population has a particular gene. A test has been developed that can determine if a person has this gene or not. The test has a false positive (says the person has the gene when they don't) rate of 6%, and a false negative rate of 3%. What is the probability that a random person will test positive to having this gene

Genes

Vinblastine is a drug that interferes with the assembly of microtubules. It is widely used for chemotherapy in treating cancer patients whose cancer cells are actively dividing to form tumors. Suggest a hypothesis to explain how vinblastine slows tumor growth. Assuming that albinism is under the control of a si

Phobias, Alzheimer's Disease & Memory

#1 Phobias Introduction: Your best friend has just called you with some great news! The president of the company that your friend works for has asked your friend to make a speech at the next stockholder's meeting. When you congratulate your friend, however, your friend tells you that a terrible fear of public speaking may

Debates: Deception, Male and Female Brain & Stem Cell Debate

#1 When Is a Lie Not a Lie? The issue of some psychological research using deception in order to gather information. This is often done in social psychology experiments where it is necessary to "set up" a situation in order to study individuals' responses. At the conclusion of the study, participants are always told the tr

Plant Biotechnology and Oak Domestication

You are a geneticist working for a firm that specializes in plant biotechnology. Explain what specific parts (fruit, seeds, stems, roots, etc.) of the following plants you would try to alter by genetic engineering, what changes you would try to make, and why, on a) corn, b) tomatoes, c) wheat, and d) avocados. Only a few

Genetically Altered Foods are overviewed.

Nowdays lots of food that get on our table are genetically altered. Some people are not bothered by that fact. Some demand more facts supporting that such foods are safe to eat and will not bring any negative alterations to our health later. The effects of GM foods are noted.

Life on earth (biological concepts from the non-science major perspective)

1. When comparing the DNA molecule to a twisted ladder, what do the rungs of the ladder represent? 2. Describe the three major properties of genes that are explained by the structure of DNA? 3. What occurs on the sex chromosomes to determine the sex of a mammal? 4. Describe a difference between meiosis and mitosis?

A Hardy Weinberg inquiry is solved.

In a population that is in Hardy-Weinberg equilibrium, 16% of the population shows a recessive trait. What is the frequency of the dominant allele (p) in the population?

Flower color in carnations

Flower color in carnations is controlled by one pair of co-dominant alleles; red flowered carnations have the genotype RR, white flowered carnations have the genotype R'R', and heterozygous individuals are pink. Of 10,000 plants in a carnation population that is in Hardy-Weinberg equilibrium, 4900 plants possess red flowers. H

Hardy Weinberg Problem

Assume that left-handedness is a recessive trait controlled by one pair of dominant-recessive alleles. If 625 of 2,500 individuals in a sample of a population is left-handed, and if the population is in Hardy-Weinberg equilibrium, how many individuals in the entire population of 10,000 would be predicted to be heterozygous for