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1. Cystic fibrosis is a chronic lung and digestive disease caused by a mutation in the CFTR gene on chromosome 7. In the United States approximately 39 in 10,000 individuals are affected with the recessive condition cystic fibrosis, 323 in 10,000 individuals are unaffected carriers, and 9,638 out of 10,000 individuals are unaffected non-carriers. Although there are over 1,000 known mutations in the CFTR gene that can lead to cystic fibrosis, we can determine the overall frequency of recessive alleles in the U.S. population.a)Calculate the observed frequency of CFTR alleles :CFTR dominant (unaffected) alleles =CFTR recessive (cystic fibrosis) alleles =b)The expected frequency of CFTR genotypes :Homozygous dominant (unaffected) =Heterozygous (unaffected carriers) =Homozygous recessive (affected) =c)Next, use the following chi-squared analysis table to determine if the U.S. population is in Hardy-Weinberg equilibrium for the recessive condition, cystic fibrosis.Degrees of Freedom = 1Critical Value = 3.84
Suppose that a team of scientists exploring in the Amazon discover various novel species of bacteria that use a non-standard nucleotide "X" in DNA.
In enzyme lab. Manganese Dioxide does not come from a living thing. Is it a catalyst (define catalyst)? Is it an enzyme? Describe. Why did we test the hydrogen peroxide with manganese dioxide.
Suppose that a light-sensitive cell in the eye of a particular invertebrate. The cell membrane contains cGMP-gated K+ channels.
What is the fiber tract that provides for communication between different parts of the CNS called? And what is the one that carries impulses between periphery and CSN called.
A color-blind woman marries a man with the normal color vision. They have ten children, six boys and four girls. How many have normal vision? How many are color- blind?
What sequence of nucleotide pairs in a Drosophila gene would encode the amino acid sequence met-trp-phe-trp-met (reading from the amino terminus to the carboxyl terminus).
In modern blimps, the gas of choice used to inflate them is helium rather than hydrogen. Hydrogen would be lighter, but helium is safer. Compare and contrast the atomic structure of hydrogen and helium.
If all other variables remain constant, when 2-action potentials enter synaptic terminal and produce pair of EPSPs in the muscle fiber, larger EPSP is produce by the secretion of:
A couple's only child has Down Syndrome. An examination of the child's karyotype reveals that he has 46 chromosomes per cell, but that one chromosome is unusually big,
What phenotypic ratio would you get if you crossed a white mouse and a heterozygous brown mouse?
how Enzymes provide energy for the reactions they catalyze
Sidney Brenner discussed that the code was non overlapping because he considered that coding restrictions would occur if it were overlapping.
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