Q. 29

Given above is th

Answer :

The functioning of this operon when lactose is provided in the growth medium of the bacteria is as follows -

Lactose enters the cell with the help of lactose permease which is already present in a small amount in the beginning. Lactose then binds to the active repressor changing its conformation. This is when the repressor fails to bind to the operator region (o). So, now the RNA polymerase is able to bind to the promoter (p) region. Hence all the three enzymes (lactose permease (from y) , transacetylase (from a) and beta-galactosidase (from z) are secreted). Allolactose is the actual inducer and not lactose.



OR


According to Mendel's law of independent assortment, when two pairs of traits are combined in a hybrid, segregation of one pair of character is independent of the other pair of characters i.e. no intermediate traits are expressed.


The cross for the given situation can be drawn in the following way:



In the given case, 'Y' is the genotypic symbol for dominant yellow seed colour, symbol 'y' for recessive green seed colour, symbol 'R' for dominant round shape of seed and symbol 'r' for recessive wrinkled seed in garden pea.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Mendel’s Law of iBiology - Exemplar

Discuss in detailBiology - Exemplar

How was it concluBiology - Exemplar

How do genes and Biology - Exemplar

A, B, D are threeBiology - Exemplar