The variation of kernel color in corn plants is an inherited trait. r is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. what is the probability that a corn plant with the genotype rr crossed with a corn plant rr will have offspring with the genotype rr? express your answer as a fraction using numerals for numbers and / for the fraction bar. do not include spaces.

The answer is 1/2.

If:
R - the dominant allele for red kernels
r - the recessive allele for yellow kernels

Then:
RR - dominant homozygote
Rr - heterozygote
rr - recessive homozygote

The cross Rr x rr will result in 1/2 of offspring with red kernels (Rr) and 1/2 of offspring with yellow kernels (rr):
Parental generation:      Rr      x      rr
Offspring generation:  Rr    Rr     rr      rr
So, there are 2 out of 4 Rr offspring (2/4 = 1/2) and 2 out of 4 rr offspring (2/4 = 1/2).

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.