Mr Hoyle Pedigree Worksheet Biology Worksheets (Page 2 of 2) in pdf

Mr Hoyle Pedigree Worksheet Biology Worksheets Page 2

Name ___________________________

Date _________ Period 1 2 3 4 5 6

Pedigree 2 shows two banana trees that were crossed to produce four F1 plants.

Shaded individuals have green leaves. Some of the plants have green

leaves and some have yellow leaves.

1. If green leaves are dominant, which parent has green leaves and which

has yellow leaves? _________________________________________

2. If yellow leaves are dominant what is the genotypes of the offspring? _______________________

Pedigree 3 is studying hair color in a family. In humans, dark hair (B) is

dominant to blonde hair (b). In this case, individuals who are shaded

are dark-haired. Individuals who have clear circles are blonde.

1. What are the genotypes of the parents? _____________________

2. What is the genotype of the sons? _______________________

3. What are the two possible genotypes of the daughters? ________________________

Pedigree 4 shows a family that has carried the gene

Pedigree 4

for albinism, a recessive gene. A carrier

has the gene, but doesn’t show the trait

(i.e. heterozygous for albinism, Aa). In

the pedigree, mark all family members

that you think are carriers for albinism

like this:

Assume that spouses from

outside the family are not carriers.

This is Interesting

Hemophilia is an X-linked recessive disorder

characterized by the inability to properly form blood clots. Minor cuts or bruises can be

fatal. The British royal family has a history of this disorder, starting with Queen Victoria. It

spread through the Royal Houses of England, Germany and Russia as monarchs arranged

marriages to consolidate political alliances. Below is a pedigree of the royal families.

Mr Hoyle Pedigree Worksheet Biology Worksheets Page 2