Mendel Genetics Problems

Please see attached word document. --- Assignment Part I - Mendelian Genetics (7.5 pts). Information on the analysis of crosses and Chi-square statistics are available under the supplemental reading section of the course website. Below is the Chi-square probability table at 0.05 (5%) Degrees of Freedom Reject the null hypothesis if the calculated chi-square is larger than 1 3.841 2 5.991 3 7.815 4 9.488 5 11.070 1. An organism with genotype AaeeDd can make how many different gametes (list each one)? (1 pt) 2. You are studying one trait that is autosomal recessive. You crossed the following true breeding parents: autosomal dominant female with an autoso... click for more

Complementation

You are handed six yeast strains: three strains (a, b, c) have a defect in the LEU1 complementation group, the other three (d, e, f) have defects in the LEU4 complementation group (LEU being an abbreviation for leucine). if you plate diploid cells, created from mating the haploid strains together, on a minimal media plate without leucine in the following pattern, what would the plate look like after several days of growth (yeast plates usually mature after two days)? what would the pattern look like if you included leucine in the agar media?

Polygenic traits

In the future, aliens who have invaded earth are conducting a survey of teenagers. when examining body modifications, they conclude that piercing is a polygenic trait. they reached this conclusion by examining only the number of piercings in a teenager, and the number of piercings in their parents. why might they conclude that the propensity for piercings is a polygenic trait? explain your answer fully in words, no equations please, including all observational patterns that might have led the aliens to their conclusions.

Plant Crosses

A cross between two inbred plants that had mean seed weights of 20 and 40 grams, respectively, produced an F1 generation with seeds weighing an average of 30 grams each. an F1 x F1 cross produced 1000 plants: 3 had seeds weighing 20 grams, 5 had seeds weighing 40 grams, and the others produced seeds with weights varying between these extremes. How many gene pairs are involved in determining seed weight differences in these plants?

Dominant traits/recessive traits

Pattern baldness in humans is controlled by a single autosomal locus with two alleles (B and B'), but pattern baldness is a sex-influenced phenotype: baldness is dominant in males (BB and BB' males become bald), but recessive in females (only BB females become bald). if a population is in Hardy-Weinberg equilibrium for this locus and 4% of the women in the population become bald, 1) what percentage of the men are bald? 2) what percentage of the nonbald women could give a gene for baldness to their sons? 3) what percentage of all possible marriages are expected to produce daughters who develop baldness? (assume that the marriages are not influenced by the baldness of the individuals) ... click for more