Copy of Incomplete Dominance, Codominance and Polygenic Traits Practice.docx

Copy of Incomplete Dominance, Codominance and Polygenic Traits Practice.docx

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Reference Chart Definition Example Dominant Stronger trait to appear The capital Y Recessive Hidden trait The lower case y Allele Alternative forms of a gene Found on the outside of punnett square Phenotype Physical make-up or physical appearance The yellow or green bean Ex:25% Short,75% Long Genotype The genetic makeup for the coded protein The yy ’s and the Yy ’s Ex: 50% Yy, 50%yy Heterozyg ous The alleles are different Aa, Yy, Cc, Rr Homozygo us The alleles are the same HH, YY, aa, bb Fingerprints and Incomplete Dominance Lab BACKGROUND INFO : FINGERPRINTS : EVERY PERSON HAS THEIR OWN UNIQUE PATTERN OF FINGERPRINTS. THIS FACT HAS LONG BEEN USED BY POLICE IN IDENTIFYING SUSPECTS. HOWEVER, ALL PATTERNS FIT INTO ONE OF THREE MAIN TYPES: WHORL, LOOP OR ARCH. WITHIN EACH OF THESE TYPES THERE IS AN UNLIMITED AMOUNT OF VARIATION. BUT EACH PERSON’S PRINTS WILL FALL INTO ONE OF THESE THREE MAJOR GROUPS. FINGERPRINT GENETICS : THE THREE MAJOR FINGERPRINT GROUPS REPRESENT A CLASSIC EXAMPLE OF INCOMPLETE DOMINANCE. INCOMPLETE DOMINANCE OCCURS WHEN NEITHER THE DOMINANT NOR RECESSIVE ALLELES FOR A TRAIT ACT FULLY TO CREATE AN INTERMEDIATE PHENOTYPE. THE DOMINANT GENE DOES NOT COVER UP THE RECESSIVE GENE, BUT INSTEAD THEIR TRAITS ARE BLENDED TOGETHER. THIS SITUATION IS SEEN IN THE DIAGRAMS BELOW:
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Answer these questions based on the Background Reading above: Question: Answer: Which print pattern is homozygous dominant?
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  • Spring '17
  • Poop Poop
  • Genetics, Zygosity

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