In a species of flowers red petals are dominant to orange petals. If two plants heterozygous for red petals are crossed what are the possible genotypes of the offspring

The possible genotypes of the offspring when two plants heterozygous for red petals are crossed is RO × RO   → RR, OR, RO, OO or

1 homozygous for red petals, 2 heterozygous for red petals and 1 homozygous for orange petals.

Explanation:

To solve the question, we note that

The red petals are dominant to the orange petals

Let R = Red and

O = Orange

Therefore we have

RO × RO

That is

                                            R                                O

                               R           RR                               OR

                               O           RO                              OO

RO × RO   → RR, OR, RO, OO

That is possible  genotypes of the offspring when the  heterozygous for red petals are crossed, RO × RO   is  RR, OR, RO, OO

Given one homozygous for red petals, two  heterozygous for red petals and one homozygous for orange petals.

i believe it is c.) 1575 j.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol