Biology Lesson – Punnett Squares

Posted: November 27, 2007

Go to http://highered.mcgraw-hill.com/sites/0078617340/student_view0/chapter5/math_practice.html

Do all 10 problems.  You MUST do a Punnett Square for each problem, or no credit.  For the problems where there is already a Punnett Square done for you, you must circle the box or boxes in the square that lead you to the answer.

Go to http://www.athro.com/evo/gen/punexam.html

Do only the first 4 problems (the monohybrid problems).  Number these problems #11-14.  Do not change the first pull down menu in the problem (for example, if it says “the bb genotype,” do not change that).  Just write the answer.

Go to http://biology.clc.uc.edu/courses/bio105/geneprob.htm

There are 10 problems (some with multiple parts), but you will only do 4 of them (number these #15-18):

Monohybrid Cross – Copy the Punnett Square and the ratios of the offspring (for example, ½ of offspring can hear, ½ of offspring are deaf).

Testcross – Copy the 3 Punnett Squares and the ratios of the offspring.

Incomplete Dominance – Copy the Punnett Square and the ratios of the offspring.

Scroll down and do

Sex (It’s a Phenotype, Not a Chromosome!) – Copy the Punnett square and the ratios of the offspring.

The following problems are only for students during the regular year, NOT for summer school students:   Do #1-13 from http://www.biology.arizona.edu/mendelian_genetics/problem_sets/monohybrid_cross/monohybrid_cross.html - copy the question (or at least the key phrases from the question) and write out the one correct answer