Unit 6 Mendelian Genetics

LEARNING OBJECTIVE #1: Using genetic vocabulary, predict the genotypic and phenotypic ratios for a single trait when crossing two parent genotypes. (In other words, know how to make a 4 box Punnet square to predict what the offspring will look like.)

https://www.youtube.com/watch?v=0vAAf4g5iF8 VIDEO CLIP SHOWN IN CLASS!

TAKE THIS PRACTICE QUIZ (added 3/15th): https://www.biologycorner.com/quiz/qz_mendel_genetics.html

Practice quiz over Karyotypes and chromosomes (added 3/15): https://www.biologycorner.com/quiz/qz_chromosome.html

VOCAB TERMS FOR MENDELIAN GENETICS (see powerpoint below or class notes below for definitions - powerpoint gives visuals! )

• Allele

• Homozygous

• Heterozygous

• Dominant

• Recessive

• trait

• Genotype

• Phenotype

• gamete

• gene pool

• true-breeding

Other words to know:

• • inherited

  • descendants

Some of the Mendelian traits we will study:

If you missed class Wed/Thur, please watch the following two videos (or watch it to reinforce what we talked about):

MENDELIAN GENETICS:

PUNNET SQUARE & TWO FACTOR CROSSES:

CLASS NOTES FROM WED/THUR:

LEARNING OBJECTIVE #2: Using genetic vocabulary, predict the genotypic and phenotypic ratios for two traits when crossing two parent genotypes. (Make a 2-Factor cross Punnet square with 16 boxes)

Here is a picture showing step by step how to do it. Just don't use the letters "s" and "y" as the are difficult to tell apart the capital from lowercase letters.

LEARNING OBJECTIVE #3: Use family pedigrees and information about individual's phenotypes to determine the genotypes of individuals in a family. Use this information, for example, to predict the likely hood of two parents having a child with the disease.

PEDIGREE SYMBOLS

VIDEOS on how to do this (be sure to watch both!)