White Flower Series
Posted in ArtGlass on 05/23/2010 01:22 am by adminWhite Flower Series
Regarding an allelic pair for flower color in snapdragons, heterozygotes have pink flowers, whereas the two ho?
1) Regarding an allelic pair for flower color in snapdragons, heterozygotes have pink flowers, whereas the two homozygotes have red flowers or white flowers. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring is expected to have pink flowers?
a) 75%
b) 50%
c) 25%
d) 100%
e) 0%
2) Snapdragons are flowers that come in a variety of colors, including red, pink, and white. A series of crosses with snapdragons having flowers of different colors produced the following results:
pink × pink: 27 pink, 13 red, 14 white
red × red: all red
white × white: all white
pink × white: 29 pink, 26 white
pink × red: 28 pink, 27 red
white × red: all pink
Based on the results, what is the most reasonable explanation for the inheritance of these flower colors?
a) incomplete dominance
b) qualitative effects
c) more than two alleles
d) codominance
e) pleiotropic effects
1) rr x ww
All offspring will be rw (pink).
The answer is d) 100%
2. Incomplete dominance
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