In tomato’s, red fruit (r) is dominant over yellow fruit (r). what is the probability that an offspring of plants that are heterozygous (rr) produce plants with the homozygous recessive (rr) genotype?

The probability of an offspring of plants that are heterozygous produce plants with homozygous recessive genotype in ratio of :

RR           :     Rr        :       rr

(red)      : hybrid      : (yellow fruit )

1             :  2            : 1  

Explanation:

Parental generation : RR              rr

                             (red fruit )           (yellow fruit )

Gamete formation : R,R                r,r

First filial generation : Rr (All are red because red is dominant )

Now let us cross the parents that is heterozygous Rr with homozygous rr :

Parental generation : Rr             Rr

Gamete formation : R,r               R,r

The second filial generation generation obtained :

                                       R        r      

                          R         RR      Rr  

                          r          rR      rr  

The genotypic   ratio :

RR           :     Rr        :       rr

(red)                          (yellow fruit )

1             :  2            : 1  

Thus, the probability of an offspring of plants that are heterozygous produce plants with homozygous recessive genotype in ratio given above

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

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