In tomatoes, the fruit color, red or yellow, is transmitted by a gene having 2 alleles: the
red allele dominated the yellow allele.
A) designate by symbols the corresponding alleles
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Ответ:
For example:
T(or any capital letter of your choice)- the red allele
t(or the lowercase letter of the letter chosen before)- the yellow allele.
Ответ:
The correct answer is b The regulator gene falls off the operator and the structural genes get transcribed.
Explanation:
Tryptophan operon contain3 regulatory genes and 5 structural genes.when adequate amount of tryptophan is present at that time the tryptophan binds to the repressor molecule encoded by tryp R gene.Thus Tryptophan act as co repressor .The repressor molecule bound to tryptophan interacts with operator region resulting in blocking the expression of structural genes.
But when tryptophan is absent at that time repressor molecule cannot function.As a result the repressor molecule fall off from the operator and structural genes get transcribed.