- No, the son never inherits colour blindness from his father.

- The gene for colour-blindness is present on the x-chromosome, but a son receives Y-chromosome from his father.

- Since a male receives the X-chromosome from his mother, he ihherits the disease from his mother only.

5ince parents are homozygous, their genotypes are:
Axial-flowered, constricted pods-AAii
Terminal-flowered, inflated pods-aall

\(F_{ 1 }\) generation Aali-(Axial flowers, inflated flowers)
The phenotype of the \(F_{ 1 }\) progeny-Axial flowers and inflated pods
The genotype of the \(F_{ 1 }\)progeny-Aali

The child with blood group O will have homozygous recessive alleles. Therefore, both the parents should be heterozygous, i.e. the genotype of father will be I^Ai and the mother will be I^Bi.

The other possible genotypes of offsprings willbe A, B and AB blood groups.

Klinefelter's syndrome
The individual has 22 pairs of autosome and XY sex chromosomes, i,e.  47 chromosomes.
Symtoms:
The individual is a male.
He shows development of feminine characters like development of breasts.
Body hair is sparse.
The individual is sterile.

Trisomy of 21st chromosome occurs due to non-disjunction, i.e. non-separation of the homologous pair of 21st chromosomes at anaphase I of meiosis during ova formation and ferlilisation of such an ovum with two 21st chromosomes with a normal sperm.
Symptoms of Down's Syndrome:
(i) Partially open mouth with furrowed tongue.
(ii) Broad, flat face with slanting eyes.
(iii) Broad palm with characteristic palm increase.
(iv) Small and arched palate.
(v) Epicanthic eye fold.
(vi) Congenital heart diseases.
(vii) Mental retardation           

(a) Round and yellow seeds
(b) Rr Yy

(d) 9 round, yellow seeded: 3 Round, green-seeded: 3 wrinkled, yellow seeded: 1 green, wrinkled - seeded
(e) Yellow-seeds: green seeds = 3 : 1 Round seeds: Wrinkled seeds = 3 : 1