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Genetics

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

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?

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

Hemophilia is a sex-linked trait in humans. That means that the gene that is responsible for it resides on the X chromosome. Hemophilia is a hereditary disorder characterized by the failure of the blood to clot properly. As a result, such individuals suffer from excessive bleeding. Sometimes it results in death. Here are th

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?

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

Rabbit phenotypes are discussed.

Consider the following hypothetical genetics information for cottontail rabbits: Ear length is controlled by one pair of co-dominant alleles (E = allele for long ears; E' = allele for short ears) located on rabbit chromosome #11. Eye color is controlled by one pair of dominant and recessive alleles (H = dom. for hazel eyes; h

Hemophilia is predicted.

If hemophilia is an X-linked recessive trait, what percent of the daughters would be expected to be carries of the disease if a hemophiliac man had children with a woman who was a carrier of the disease? Predictions occur.

Blood types

A man with Type O blood has children with a woman who has Type AB blood. what blood types would represent the full range of possible phenotypes in children that the man and woman might have together

Red - green colorblindness

A colorblind woman marries a man with normal color vision. What percentage of their sons would be expected to be coloblind, what percentage of their daughters would be ecpected to be colorblind explain answers about sons and duarghters that would be expected to be colorblind in genetic words.

Y-linked trait

Is it possible to have a Y-linked trait that affects females? why or why not?

Genotype of a particular chipmunk is debated.

In a captive colony, he selects a male chipmunk with short ears. Without any additional information, would the geneticist know the genotype of that particular male chipmunk? If yes, what would the short-eared chipmunk's genotype be. If no, how could the geneticist determine the genotype of that particular chipmunk? Ideas are i

Heterozygoous genotypic and phenotypic ratios are determined.

In peas, color (yellow or green peas) and seed texture (smooth or wrinkled ) obey Mendelaian laws. Yellow is dominant over green, and smooth is dominant over wrinkled. A pea plant heterozygous for both traits is crossed with a plant that has green wrinkled peas. What are the expected genotypic and phenotypic ratios in the offs

Hemophilia is predicted.

If a woman is a carrier for hemophilia and has a child with a man who does not have hemophilia, what percentage of their sons would be expected to have hemophilia? What percentage of their daughters would be expected to be carriers of the gene for hemophilia? Ideas are expressed.

Genotypes and phenotype ratios

What would be the expected genotypic and phenotypic ratios in the f1 and f2 generations, if flower color in carnations is controlled by co-dominant alleles and you begin with the P generation using pure, or true-breeding, carnations that have different (red & white) flower colors?

Defendant's Genes Do Not Excuse Criminal Behavior

Today, scientific advances are being made at an astounding rate, and nowhere is this more evident than in our understanding of the biology of heredity. Using DNA as a starting point, do you believe there are limits to the knowledge people should acquire? Defend your answer. Because genetics is important to so many aspects of

Alzheimer's Disease Chemistry

What is the chemistry behind the possible causes of Alzheimer's disease (including bonding and molecular structure of any molecules involved in its progression or treatment)?

The Manx Cat and issues of heterozygous for the gene are investigated.

Need help getting started Manx cats are distinctive because they do not have tails, their front legs are shorter than their rear legs and they often travel by hopping. These traits are controlled by a single gene. Manx cats are heterozygous for a dominant allele that causes these traits. Explain what type of of cross is

The Manx cat is the featured subject.

Manx cats are distinctive because they do not have tails, their front legs are shorter than the rear legs, and they often travel by hopping. These traits are are controlled by a single gene. Manx cats are (heterozygous for a dominant allele that causes these traits). Question#1: Explain what type of cross is required to pr

Crossing homozygous plants with differing characteristics

I had to cross a homozygous dominant smooth, yellow seeded plant with a homozygous excessive wrinkled, green seeded plant, and this is what I came up with: A. The P1 genotypes ___YY___ x ___yy__ B. Possible gametes are ___Y___, __Y___, ___y__ and __y___ *Then I had to use the Punnett square and complete the

Cross a homozygous dominant smooth seed

Cross a homozygous dominant smooth seed with a homozygous recessive wrinkled seed *I have to cross a homozygous dominant smooth seed with a homozygous recessive wrinkled seed answering the questions: A. P1 individuals genotypes ____________ x _________ B. Possible gametes *Then I have to use the Punnett square and comp

Genetic Cross problems are worked.

In pigs, there are two loci which can influence skin color, genes A and B. Color ranges from roan (red) to sandy to white. Roan pigs have at least one dominant allele at both loci, sandy pigs have at least one dominant at either (but not both) loci, and white pigs have no dominant alleles. a) Researchers mate a red pig (AABB)

Genetic diversity

What is one way that genetic diversity can be introduced in mitosis?

Need help answering question below

Gene probes cab be labeled for detection with: a) enzymes b) flourescent dyes c) radioisotopes d) all of the choices are correct e) none of the choices are correct