Question

If a plant genotype R1R1R0R0 produces potatoes of 240g weight while genotype r1r1r0r0 produces potatoes of 100g weight. What is the weight of potatoes in R1R1R0ro ?

Answer 1

Explanation:

The genotype aabbcc is considered as homozygous recessive genotype, the genotype AABBCC is considered as homozygous dominant genotype.

The total number of alleles in each genotype is 6. The value of homozygous dominant is 160 kg, the value of homozygous recessive is 100 kg. The difference of these two values is divided by total number of alleles in each genotype to find out the contribution of each polygene as in the image.

So the, correct option iis '10 kg'.

Answer 2

Weight of potatoes with genotype R1R1R0r0 will be 205g.

Explanation:

Since the genotype of one plant is given as R1R1R0R0 i.e it is of the type AABB so it has 4 alleles of dominant type, so each allele makes a contribution of 240g divided by 4 which is 60g.

Now the other plant with all recessive alleles has a genotype of r1r1r0r0 i.e it is of the type aabb so it has 4 alleles of recessive type so contribution of each allele is 100g divided by 4 that is 25g each.

So the genotype R1R1R0r0 will have 3 dominant and 1 recessive allele so

Dominant contribution = 60*3= 180

Recessive contribution= 25*1= 25

Total = 180+25 = 205g

Thus R1R1R0r0 genotype makes a contribution of 205g