momlearing
18.12.2019 •
Biology
Saguaro cacti are very tall cylindrical plants that usually have two l-shaped arms, on on each side. you live in arizona and have a saguaro growing in your yard. your saguaro has two arms but one is longer than the other. assume that arm length in these cacti is controlled by a single gene with arms of the same length (a) being dominant to arms of different lengths
a. what is the genotypic ratio of caucus?
b. could one of the parents of your caucus have had a phenotype with arms the same length? (yes or no)
c. if so, what would have been the genotype of that parent?
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Ответ:
The options for question a is
AA Aa aa
The ANSWER is aa
The options for question b is yes or no
The ANSWER is a big YES
The options for question c is
AA Aa aa
The CORRECT ANSWER IS Aa
Explanation:
B. the dominant allele here is having arms the same length.
The cactus in the question has arms of different lengths expressing lack of dominant alleles,
C. The cactus received one a each from both parents.
Assuming one of those parents must have had one A allele,
Ответ: