Assignment 8: Practice Problem Answer the practice problem given below. You must

Question

Assignment 8: Practice Problem Answer the practice problem given below. You must show all your work-do not just give the final number/answer for any part of the question! This is a single-gene trait expressing complete dominance. You may turn in a typed assignment sheet or handwrite the answers- due at beginning of Human Genetics lab. 1. 2. 3. Grading: . 5 points: all parts of problem answered correctly with all work shown 3 points: one part of problem answered incorrectly or one part with work not shown 1 point: more than one part of problem answered incorrectly (or) more than one part with work not shown O points: assignment not turned in (or) information emailed . Practice Problem In cattle, black coat color is dominant over red coat color and the absence of horns (called "polled") is dominant over the presence of horns. Cross two parents that are heterozygous for both traits Cross:X Punnett Square: Phenotypic ratio expected

Explanation / Answer

BbHh X bbhh

f1 BH bh

Gametes produced are- BH,Bh, bH, bh

BH Bh bH bh

Ratio is 9;3;3;1

Black and hornless 9:Black horned 3:red hornless 3:red horned 1

BH BBHH BBHh BbHH BbHh Bh BBHh BBhh BbHh Bbhh bH BbHH BbHh bbHH bbHh bh BbHh Bbhh bbHh bbhh

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