Name: / / l£> -f-, ___:::::_-+,----- Date:----- Period:·--- Autosomal Pedigrees Worksheet Background Information: Pe digrees are used to trace a gene as it is passed down from generation to generation.. The squares represent a male and the circles represent a female. In the examples on this handout, the shaded circles and squares will represent having the disorder. Make sure to read each question to find out if a disorder is caused by dominant alleles or recessive alleles. A person can be a carrier of a trait, meaning they have heterozygous alleles. 1) Cystic fibrosis is an autosomal recessive disease where mucus develops in the lungs, liver, and the pancreas. Below is an autosomal pedigree tracing the passing of the cystic fibrosis gene through 3 generations. Write in the genotypes on the line next to / below each individual. M I1L Aa M For allphenotype questions below, answers include: normal, --.· cystic.fibrosis. 2) What is the phenotype of individual:/--� � ·Ac�;/Vl[c -� OY'\'\�c:>-.�) 3) What is the phenotype of individual 1[-i/ A --, 10) Sickle-cell anemia is an autosomal recessive genetic disorder that causes red blood cells to change shape, which can cause the red blood cells to become stuck in blood vessels. Write in the genotypes on the line next to / below each individual. M M: A-

Autosomal Pedigree Extra Worksheet

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