Biology School Worksheet printable pdf download

Biology School Worksheet

Section: 3.4

Name:

Opening Activity:

Latin Root Word:

Review of Old Information:

In seals, the allele for long whiskers (L) is dominant and the allele for short whiskers (l) is recessive. What are the genotypic

and phenotypic ratios from a cross of a homozygous dominant and heterozygous seal for the above trait? SHOW ALL WORK!!!

Genotypic Ratio: __________

Phenotypic Ratio: __________

2. In the land of Oompah, red hair (H

) is dominant to blue hair (H

), and the heterozygous condition (H

) produces purple

hair. Blue hair is highly valued, in fact, blue haired Oompahs even get special benefits. Oscar Oompah has purple hair but he

wants to find a wife that will give him blue haired children. What genotype for hair color should his wife have? What would be

his second choice? Use punnet squares to prove your point!!!

First Choice: __________

Second Choice: __________

3. The color green is dominant to the color yellow. If a homozygous green pea plant is crossed with a homozygous yellow pea

plant then what would be the genotypic and phenotypic ratios of the offspring?

Genotypic ratio____________________

Phenotypic ratio___________________

4. Two heterozygous white (brown fur is recessive) rabbits are crossed. What are the genotypic and phenotypic ratios of the

offspring?

Genotypic ratio____________________

Phenotyipc ratio___________________

5. A breeder performs a testcross to determine whether an Alaskan malamute is homozygous dominant (DD) or heterozygous

(Dd) for a recessive dward allele. Half the offspring appear dwarf. What is the genotype of the dog?

Circle one:

Biology School Worksheet