Family Pedigree Project

Family Pedigree Project: Wed. November 9th Introduction: A pedigree is a family tree that shows the relationships among family members and traces a specific genetic trait within the family. It is a “shorthand” way to represent the members of a family.

By following a few guidelines, you can make a pedigree chart for your family. You might even be able to find a pattern in the way a family characteristic is inherited. Directions: Using a poster board or construction paper create your family (at least 10 family members) pedigree of one particular trait. (Traits are listed below.) Include the following: (50 points possible)  a legend (see example below)  First names for all members  A title detailing what trait you will explore  Indicate people with the trait, carriers and people without the trait Note: If it is a dominant trait, there are no carriers, only people who have it or not.  Indicate whether the trait is dominant or recessive  Create a Punnett square of 2 people with known genotypes. What are the possible offspring’s genotypes and phenotypes?  Indicate the genotype of each person (If there are several possible genotypes, put a question mark for that allele.) Example: Tongue roller (T?)

Family Pedigree Project: Wed. November 9th Introduction: A pedigree is a family tree that shows the relationships among family members and traces a specific genetic trait within the family. It is a “shorthand” way to represent the members of a family. By following a few guidelines, you can make a pedigree chart for your family. You might even be able to find a pattern in the way a family characteristic is inherited. Directions: Using a poster board or construction paper, create your family (at least 10 family members) pedigree of one particular trait. (Traits are listed below.) Include the following: (50 points possible)  a legend (see example below)  First names for all members  A title detailing what trait you will explore  Indicate people with the trait, carriers and people without the trait Note: If it is a dominant trait, there are no carriers, only people who have it or not.  Indicate whether the trait is dominant or recessive  Create a Punnett square of 2 people with known genotypes. What are the possible offspring’s genotypes and phenotypes?  Indicate the genotype of each person (If there are several possible genotypes, put a question mark for that allele.) Example: Tongue roller (T?) Possible traits: Sample Pedigree Trait Dominant Recessive Eyelash length long (1 cm or more) short (less than 1 cm) = Male = Female Widow’s peak widow’s peak straight hairline Dimples Dimples No dimples or = person with the trait Freckles Freckles No freckles Ear lobes Free ear lobes Attached or = carrier Hair on middle digit Hair on middle digit No hair on middle digit Roman nose Roman nose (bent) straight nose = marriage Toe length 2nd toe longer Big toe longer Hand use Right-handed Left-handed Tongue roller Tongue roller Non-tongue roller Height Short Tall = offspring or children Females: less than 5’7 5’7 or above Males: less than 5’10 5’10 or above Curved Thumb Hitchhiker thumb Straight Thumb = twins Cleft Chin No cleft Chin Cleft Chin

or = deceased

Possible traits: Sample Pedigree Trait Dominant Recessive Eyelash length long (1 cm or more) short (less than 1 cm) = Male = Female Widow’s peak widow’s peak straight hairline Dimples Dimples No dimples or = person with the trait Freckles Freckles No freckles Ear lobes Free ear lobes Attached or = carrier Hair on middle digit Hair on middle digit No hair on middle digit Roman nose Roman nose (bent) straight nose = marriage Toe length 2nd toe longer Big toe longer Hand use Right-handed Left-handed Tongue roller Tongue roller Non-tongue roller Height Short Tall = offspring or children Females: less than 5’7 5’7 or above Males: less than 5’10 5’10 or above Curved Thumb Hitchhiker thumb Straight Thumb = twins Cleft Chin No cleft Chin Cleft Chin

or = deceased