In garden peas, the allele for tall plants is dominant over the allele for short plants. a true-breeding tall plant is crossed with a short plant, and one of their offspring is test crossed. out of 20 offspring resulting from the test cross, about should be tall[a] 0[b] 5[c] 10[d] 15[e] 20

The correct option is C)10

The punnet square for the parent cross is shown below:

       t       t

T      Tt    Tt

T      Tt     Tt

The punnet square for the test cross is shown below

         t         t

T       Tt       Tt

t         tt        tt

As 50% of the offsprings will be dominant. Hence, out of 20, 10 will be tall.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.