Genetic crosses with sex linked traits are examined.
In J.R.R Tolkien's The Lord of the Rings, the Black Riders of Mordor ride steeds with eyes of fire. As a geneticist, you are very interested in the inheritance of the fire-red eye colour. A discovery is made that the eyes contains two types of pigments, brown and red, that are usually bound to core granules in the eye. In wild-t ...continues
Five single rII deletion mutants of phage T4 were spot-tested in all pairwise combinations to test for their ability to give r+ recombinants. The results are given in Table (a). Five different point mutations were then tested in the same way for their ability to recombine with the five deletions. These results are given in Table ...continues
Determining haplotypes is achieved.
An autosomal dominant disease (Huntington disease) is being transmitted in the pedigree below. A two-allele marker (designated 1 and 2) has been typed for each family member. What are the mother's haplotypes i.e. which alleles are inherited together? What is the recombination frequency for the marker and the disease locus? What ...continues
(a) Give the genotypes of the two parental goats, showing gene arrangement and gene order. (b) Give the % recombination between each pair of genes. (c) Draw a map showing the positions of all genes and distances between genes, where appropriate (d) Give the formula and calculate the coefficient of coincidence (e) Calcula ...continues
4. In yeast, wild type colonies are white. Adenine-requiring auxotrophs (ad) are red when grown on medium containing limiting amounts of adenine. This is due to the accumulation of a red precursor in adenine biosynthesis. If cells from an ad strain are plated on minimal medium most cells don’t produce colonies but two rare ty ...continues
1 Two new hair dyes A and B were tested in the Ames test. Both were tested with and without liver homogenate. Two auxotrophic strains of bacteria were used, one in which the auxotrophy was caused by a nonsense mutation (mutant 1) and the other by a frameshift mutation (mutant 2). After treatment the cells were plated on minimal ...continues
We did a lab with DNA standards. We made one to one solutions of onion DNA that we precipitated and a 4% NaCl soln. We measured the amount of DNA using spectrophotometers. When we boiled the solution before measurement, the NaCl precipitated. This made the solution cloudy and the absorbancy readings inaccurate. I'm wondering ...continues
Construct a standard curve from a data set and find the concentration of an unknown sample. The following data was obtained using spectrophotometry: Absorb.----------- ug/ml protein 0--------------------------0 0.22--------------------100 0.098-------------------50 0.086-------------------25 0.038------------------12.5 ...continues
This job understands standard deviation.
How do I calculate the standard deviation for a set of data?
Evolution Problems Involving Math are included.
Background The Hardy-Weinberg law states two things: 1. If no outside forces are acting on the population, then the allele frequency will remain constant from one generation to the next. 2. If no outside forces are acting on the population, then the genotype frequencies will be p^2, 2pq, and q^2. The converses of these sta ...continues
