"The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and deacetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. i- p+ o+ z+ y+ a-/i+ p+ oc z- y+ a+ "

Explanation:

As given;

Z translated into  beta-galactosidase;

y into permease;

And A into deacetylase;

and

U= uninducible,

I= inducible;

C= contitutive,

and  p= promoter, o= operator,  and etc

as here

merozygote  i- p+ o+ z+ y+ a-/i+ p+ oc z- y+ a+

it will constitutively encode for y+ and a+;  as the o⁽ is constitutive of i+ p+ oc z- y+ a+

and there is no synthesis from i- p+ o+ z+ y+ a- because  of i+ of i+ p+ oc z- y+ a+

z -

y +

a +

So it will constitutively encode permease (y), and deacetylase (a)

and there is no production of beta-galactosidase (z).

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )