Aplant that has round and yellow seeds (rryy) is crossed with a plant that has round and yellow seeds (rryy). what is the ratio of the offspring that will have round and yellow seeds?

key: r = round
r = wrinkled
y = yellow
y = green
1: 16
3: 16
8: 16
9: 16

The correct answer is- 9:16.

In the given question, genotypes of the parents are-

RrYy and RrYy, which shows heterozygous ( having two different alleles such as 'R' and 'r', 'Y' and 'y') dominant genotype for the shape and color of the seeds. A dominant allele ( shown with capital letter) masks the expression of a recessive allele ( that is presented with small letter).

Both the parents will produce same gametes, which are-

RY, Ry, rY, and ry.

When they are allowed to cross, they will produce offspring with 16 different  genotypes ( corresponding to 4 different phenotypes that are round yellow, round green, wrinkled yellow, and wrinkled green).

The ratio of the offspring that will have round and yellow seeds is 9: 16.

Refer punnett square.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.