CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 11.1, Problem 1CC

DRAW IT Pea plants heterozygous for flower position and stem length (Aa Tt) are allowed to self-pollinate, and 400 of the resulting seeds are planted. Draw a Punnett square for this cross. How many offspring would be predicted to have terminal flowers and be dwarf? (See Table 11.1)

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Y = yellow, y = green; R = round seed, r = wrinkled seed Dihybrid cross: If you mate YyRr x YyRr then what proportion of offspring will be green and wrinkled? 6/16 3/16 O 1/16 O 9/16
Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What are the genotypes of the gametes that are produced by a plant that is heterozygous for both traits? hint* This is a dihybrid self cross of an F1 heterozygous generation. O Tt, TT, tt, Pp, PP, and pp P, p, T, and t PT, Pt, pT, and pt PT and pt
Purple Stem A All seedlings are 72 hours old. Standard Height R seed coat Green Stem a Purple Stem Standard Non-Purple Stem Standard (anl/anl, ROS/ROS) Purple Stem Rosette-Dwarf Non-Purple Stem Rosette-Dwarf Dwarf Height r (ANLIANL, ROS/ROS) (ANLIANL, ros/ros) (anl/anl, ros/ros) Cross a heterozygous (for color only!) purple stem standard (homozygous for height) with a green stem dwarf. What are the parental genotypes? What % is each phenotype in the offspring?
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