Alexis Smith - Pedigree Worksheet

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Lewis-palmer High School *

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PHYSICS

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Biology

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Nov 24, 2024

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pdf

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Uploaded by SuperSummerSparrow15

Pedigree Worksheet Name _____________________________ Period _______ Date _______________ Interpreting a Human Pedigree Use the pedigree below to answer 1-5 1. In a pedigree, a square represents a male. If it is darkened he has hemophilia ; if clear, he had normal blood clotting. a. How many males are there? __________________ b. How many males have hemophilia? ____________ 2. A circle represents a female. If it is darkened , she has hemophilia ; if open she is normal. a. How many female are there? _________________ b. How many females have hemophilia? __________ 3. A marriage is indicated by a horizontal line connecting a circle to a square. a. How many marriages are there? _______________ 4. A line perpendicular to a marriage line indicates the offspring. If the line ends with either a circle or a square, the couple had only one child. However, if the line is connected to another horizontal line, then several children were produced, each indicated by a short vertical line connected to the horizontal line. The first child born appears to the left and the last born to the right. a. How many children did the first couple (couple in row I) have? ______________ b. How many children did the third couple (couple in row III) have? _____________ 5. Level I represent the first generation, level II represents the second generation. a. How many generations are there? _______________ b. How many members are there in the fourth generation? _____________ Use the pedigree below to answer 6-12 Shaded individuals have Huntington’s Disease 6. Write the generation on the pedigree numbers (roman numerals). 7. Which members of the family above are afflicted with Huntington’s Disease? ____________________________ 8. There are no carriers for Huntington’s Disease- you either have it or you don’t. With this in mind, is Huntington’s disease caused by a dominant or recessive trait? ___________________ 9. How many children did individuals I-1 and I-2 have? _______________________________________________ 10. How many girls did II-1 and II-2 have? __________ How many have Huntington’s Disease? _______________ 11. How is individual III-2 and II-4 related? _____________________ I-2 and III-5? ______________________________ 12. Write the genotypes of each individual on the pedigree. Pedigree Worksheet 1 of 3

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