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learn that heredity does not parents but may resemble some more remote ancestor in all ways For some traits heredity insures that the young will not resemble their Activity Study the figure to the right In the P generation a pure tall plant homozygous dominant 77 is crossed with a pure short plant homozygous recessive tt TT means that the tall plant inherited a gene for tallness 7 from each of its parents The short plant inherited a gene for shortness t from each of its parents In F1 generation you see what happens when TT is crossed with tt All of the offspring get a T gene from one parent and a t gene from the other parent These offspring are all Tt which means that they are heterozygous for height All of these heterozygous plants hybrids are tall as tallness 7 is dominant In F2 generation you see what happens when two heterozygous are crossed Three out of every four plants will appear to be tall and one plant will be short Of the four plants two will be carriers for shortness A B C D E chhe thumo F A Tt is just as tall as a TT A Tt is half as tall as TT P F1 F2 B What is the genotype of the offspring TT Sonharfio 10 the Lope Igh Tt7 off TT Tt tt YOUR UNDERSTANDING Rucessivo Tou 1 After studying the example and above answer the following questions Answer the following as true or To vnem false Solda nii einenng or old ing F Tt A Tt is a heterozygous of this trait When heterozygous plants are crossed only tall plants are produced If tt was crossed with tt all of the offspring will be short Tt is a carrier for shortness in plants Tt t 2 In a cross of wing color black B is dominant and white b is recessive Cross a BB with bb Fill in the Punnett squares showing the cross and answer the questions A What color are the offspring phenotype would they look alla Explain Cont

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