Genetic

Fill out the worksheet and answer the questions Genetics Lab Worksheet

Name__________________________ Section______        Date_____________

Genetics Problems

1. Fill in the punnett square representing the cross between two purebred parent plants (parental cross).  The wildtype green allele is G and albino allele is g.  One parent was purebred albino and the other was purebred green.

♀ Parent   Allele 1    ♀ Parent  Allele 2

What are the genotypes and phenotypes of the progeny (F1)? 1 pt

Fill in the punnett square representing a cross between two F1 progeny on the next page.

♀ Parent   Allele 1    ♀ Parent  Allele 2

What are the genotypes and phenotypes of the progeny (F2)? 1 pt

Actual number of albino plants in the F2______  Number of green plants _______

Out of twenty plants how many would you expect to be albino and how many green? 1 pt

Why was your result “probably” different than the expected? 1 pt

2. The condition of dwarfism is dominant (D) over normal height (d).  Draw a punnett square for what would happen if a woman who is a dwarf marries a man who is not and they have children.  What are the chances (probability) that the children will have the dwarf condition?  (Assume there are no homozygous dwarf individuals). 3 pts

Use the Table below to determine and record your individual traits.

Table 1    Individual Traits   2 pts

How many dominant traits in Table 1 do you have? __5_recessive? __5_ 1 pt

Use Table 2 to record and determine the frequency of these different alleles in lab class. Each percentage equals the number of students with the dominant OR recessive trait divided by the total number of students times 100%.  Total number of students is _16___.