Family Genetics Project - Biology Worksheet printable pdf download

Family Genetics Project - Biology Worksheet

Name______________________________ Class_______ Date_____________

Family Genetics Project

Pedigree Chart: Trait: ______________

Dominant form = _________; Recessive form = __________

maternal side

paternal side

Notes:

(Punnett Squares, explanations, etc.

1. Symbols above:

= male;

= female,;

= marriage;

= children from marriage.

2. Symbols you will use:

= carrier of recessive gene;

= x- linked carrier of recessive gene;

= either heterozygous or homozygous;

= possible x-linked carrier of recessive gene;

homozygous recessive;

= unknown genotype/phenotype,

rarely - only if there is 0 DOUBT

that the individual is homozygous dominant.

3. Note: shading always indicates the presence of a recessive gene - full-shading = homozygous recessive

while half-shading = heterozygous. Half-striping is used to represent individuals that appear dominant

but could be homo- or heterozygous. Individuals that appear dominant MUST BE HALF-STRIPED

unless direct evidence shows that they are homozygous dominant.

4. Genotypes should be printed inside the circles and squares. Print the phenotypes of the individuals below

their symbols in the blanks provided.

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Family Genetics Project - Biology Worksheet