Author: Anonymous

Which of the following statements regarding a genetic map (also called a linkage map) is false?

Two parents have the following genotypes at loci for three autosomal recessive disorders and one X-linked recessive disorder.  All 4 loci segregate independently.   AaBbCcXdY crossed with AaBbCcXDXd   What is the genotype of a child affected by all four disorders?

Wild-type tigers are orange (shown in orange).  White tigers are caused by a recessive mutation in the autosomal SLC45A2 gene (shown in white).  You work at a tiger rescue and are trying to predict the coloration of a new tiger cub about to be born (marked with the ?).  II-4 and II-5 come from zoos with no history of white tigers. What is the probability that the new cub will be white colored?

Using the same cross above, what is the probability of having a child affected by all four disorders?   Remember: The following genotypes have loci for three autosomal recessive disorders and one X-linked recessive disorder.  All 4 loci segregate independently. AaBbCcXdY crossed with AaBbCcXDXd  

The relative location of two genes (a and b) is being studied in yeast (S. cerevisiae).  The following data are obtained.  What is the distance between these two genes? Parental cross: AB x ab AB Ab AB AB Ab Ab ab aB aB ab aB ab 883 9 108    

If both parents were known to be heterozygous for the recessive albino allele, what is the chance of three albino and two normal children if they have five children?

American chestnut trees were once the predominant species of tree in the eastern half of North America but this species has become virtually extinct due to a disease – chestnut blight.  Some of the last surviving trees were crossed to European chestnut trees which are resistant to the disease.  While European chestnut trees can provide potential genes for resistance to the disease, they also have lower nutritional quality of the chestnuts.  You hypothesize that the disease resistance and poor nutritional quality are both dominant traits.  The F1 trees from a cross of the European and American chestnut trees are self-pollinated and you observe the following off-spring.  Develop a hypothesis and calculate a chi-square value. Disease resistant, poor nutritional quality – 139 trees Disease resistant, high nutritional quality – 45 trees Disease sensitive, poor nutritional quality – 54 trees Disease sensitive, high nutritional quality – 18 trees

Based on the chi-square value in the problem above and the critical values (below) you would accept your hypothesis.

Which of these is an example of haptics?

Nonverbal communication is always less important than verbal communication.