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    Genetics

    Genetics: cottontail rabbits

    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 as a Recessive Trait is Found

    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.

    Phenotypic ratio of a dihybrid cross

    4 phenotypic combnations would include : dominant for both trait #1 & trait #2 Dominant for Trait #1 & Recessive for Trait#2 Recessive for Trait#1 & Dominant for Trait #2 Recessive for both Trait#1 & Trait #2

    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)?

    Manx cats and tail trait

    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

    Fruit fly spermatogonia in the interphase

    I'm haviing problems starting with a fruit fly spermatogonia in the interphase and taking it through the entire meiotic process using these labels as I need them: Interphase - Nucleus - Centrosomes - Spindle fibers - Double-stranded chromosome -Metaphase I & II -4 sperm- Anaphase I & II - Telophase I & II - Prophase II

    Genetic Cross problems

    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)

    Gene Probe Labels for Detection

    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

    Down syndrome

    Down syndrome occurs once in approximately 700 live births. The vast majority of these cases are due to trisomy 21 resulting from a non-disjunction event. In rare cases, Down syndrome is caused by a reciprocal translocation between chromosome 21 and the tip of chromosome 14 (or some other autosome) in the germ line. No genes

    Genes

    Highly expressed genes have a much greater tendency to lose introns (in evolutionary time scale) than genes expressed at very low levels. What molecular mechanism explains this difference?