1 059 STUDY OF SOME COMMON GENETIC TRAITS CONCEPT To survey the occurrence of the following genetic traits among the students in a class then in their families Attached and free earlobes Hitch-hikers Thumb and Straight thumb Widows peak and Straight hairline Tongue rolling and lack of Tongue rolling 2 ATTACHED EARLOBES Recessive FREE EARLOBES Dominant HITCH-HIKERS THUMB Dominant STRAIGHT THUMB THUMB Recessive 3 STRAIGHT HAIRLINE Recessive WIDOWS PEAK Dominant ABILITY TO ROLL TONGUE Dominant LACK OF ABILTY TO ROLL TONGUE Recessive 4 Use this data table to keep track of the traits listed above. 5 (No Transcript) 6 Pick letters to represent traits like abbreviations. The dominant allele is written with a capital letter. The recessive allele gets a lower case letter. W dominant widows peak allele w recessive straight hairline allele E Free Ear Lobes ( dominant) e Attached Earlobes (recessive ) H Hitch-hikers Thumb h Straight Thumb R Tongue rolling r lack of tongue rolling ability
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