Mentoring Worksheet 12 Mendel and Extensions Learning Goals Can you Distinguish between the blending hypothesis and Mendel s ideas regarding inheritance Distinguish between the law of the segregation of alleles and the law of independent assortment Draw a diagram that shows how alleles for 1 2 genes on different chromosomes would behave during meiosis What if they were one the same chromosome Predict potential progeny that would be produced from a given cross involving up to 5 different genes Determine the likely mode of inheritance dominant or recessive and parental genotypes if given the results of a genetic cross Design a cross that would allow you to determine the genetic make up of an unknown individual Distinguish between different factors that coould affect how genotype relates to phenotype incomplete dominance codominance etc and how this would affect the types of offspring produced by a given cross Terms and Concepts alleles loci genotype phenotype probabilities P F1 F2 generations law of segregation co dominance pleiotropy sex linkage Penetrance norm of reaction dominant recessive punnett square hybrid monohybrid dihybrid true breeding law of independent assortment Multiple alleles epistasis chromosomal linkage gene mapping homozygous heterozygous multiplication and addition rules test cross character trait complete incomplete dominance polygenic quantitative trait pedigree recombination hemizygous Mentoring Worksheet 12 Mendel and Extensions Section Please circle 9 AM 11 15 AM Group Group Members present Please turn one copy of this completed worksheet into your mentor at the end of the session 1 A diploid organism has two pairs of chromosomes containing three genes You examine an individual that is heterozygous for all three genes arranged as shown to the right D a Draw the arrangement of the chromosomes for a cell at metaphase of mitosis a B A b d b Draw all of the different possible arrangements of the chromosomes for a cell at metaphase of Meiosis I c What is the genotype of all of the gametes that would be produced from meiosis of this cell Assuming crossing over DOES occur Mentoring Worksheet 12 Mendel and Extensions Parent 1 Parent 2 AaBbccddEe x AabbCcDdEe 1 You perform the cross shown above to examine the inheritance of five genes A E a What is the probability of a gamete containing recessive alleles for all five genes being produced from i Parent 1 ii Parent 2 b What is the probability this cross might produce the following offspring i Heterozygous for all five genes ii Homozygous dominant for all five genes iii Homozygous recessive for all five genes iv Look like Parent 1 v Look like Parent 2