Genetics Question part 1 and 2 SpongeBob SquarePants and Patrick harvest 500 sea
ID: 300143 • Letter: G
Question
Genetics Question part 1 and 2
SpongeBob SquarePants and Patrick harvest 500 sea anemone progeny (from a cross between two sea anemones, Earl and Pearl) that are
300 purple and long-spiked
75 purple and short-spiked
85 red and long-spiked
40 red and short-spiked
(Fill in all blank boxes below!)
1. Fully state SpongeBob’s hypothesis:
2. Diagram the ACTUAL CROSS that resulted in the sea anemone progeny you are studying (GENOTYPE and PHENOTYPE of the PARENTS (Earl and Pearl) and PROGENY in this cross)
Use the letters A and a for anemone color and B and b for spike length
CORN
GENOTYPE
PHENOTYPE
PARENT 1
Earl (AaBb)
Purple, Long
PARENT 2
Pearl (AaBb)
Purple, Long
PROGENY
SpongeBob SquarePants and Patrick harvest 500 sea anemone progeny (from a cross between two sea anemones, Earl and Pearl) that are
300 purple and long-spiked
75 purple and short-spiked
85 red and long-spiked
40 red and short-spiked
(Fill in all blank boxes below!)
Explanation / Answer
1. There would be two genes are involved for the color of the sea anemone and the length of its spikes, if four different phenotypes are observed from the cross between Earl Anemone and Pearl Anemone.
B. As we see that progenies with phenotypes purple and long are most number, we can say that these are dominant genes. So, ‘A’ will stand for purple, ‘a’ for red color in sea anemone. The other gene ‘B’ is showing dominant long spike over recessive ‘b’ as short spike.
Earl Anemone, genotype for parents = AaBb (purple, long)
Pearl Anemone, genotype for parents = AaBb (purple, long)
AaBb x AaBb
Gametes
AB
Ab
aB
ab
AB
AABB purple, long
AABb purple, long
AaBB purple, long
AaBb purple, long
Ab
AABb purple, long
AAbb purple, short
AaBb purple, long
Aabb purple, short
aB
AaBB purple, long
AaBb purple, long
aaBB red, long
aaBb red, long
ab
AaBb purple, long
Aabb purple, short
aaBb red, long
aabb red, short
Gametes
AB
Ab
aB
ab
AB
AABB purple, long
AABb purple, long
AaBB purple, long
AaBb purple, long
Ab
AABb purple, long
AAbb purple, short
AaBb purple, long
Aabb purple, short
aB
AaBB purple, long
AaBb purple, long
aaBB red, long
aaBb red, long
ab
AaBb purple, long
Aabb purple, short
aaBb red, long
aabb red, short
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