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प्रश्न
In the following crosses write the characteristics of the progeny
| Cross | Progeny |
| (a) RR YY × RR YY | __________________ |
| Round, yellow Round, yellow | __________________ |
| (b) Rr Yy × Rr Yy | __________________ |
| Round, yellow Round, yellow | __________________ |
| (c) rr yy × rr yy | __________________ |
| wrinkled, green wrinkled, green | __________________ |
| (d) RR YY × rr yy | __________________ |
| Round, yellow wrinkled green | __________________ |
उत्तर
| (a) Parents - | RRYY | × | RRYY |
| Round, yellow | Round, yellow | ||
| Gametes - | RY | RY | |
| Progeny - | RRYY | ||
| Round, Yellow | |||
| (b) Parents - | RrYy | × | RrYy |
| Round, yellow | Round, yellow | ||
| Gametes - | RY, rY, Ry, ry | RY, rY, Ry, ry |
| RY | rY | Ry | ry | |
| RY | RRYY Round, yellow |
RrYY Round, yellow |
RRYy Round, yellow |
RrYy Round, yellow |
| rY | RrYY Round yellow |
rrYY Wrinkled, yellow |
RrYy Round, yellow |
rrYy Wrinkled, yellow |
| Ry | RRYy Round, yellow |
RrYy Round, yellow |
RRyy Round, green |
Rryy Round, green |
| ry | RrYy Round, yellow |
rrYy Wrinkled, yellow |
Rryy Round, green |
rryy
Wrinkled, greem |
| (c) Parents - | rryy | × | rryy |
| Wrinkled, green | Wrinkled, green | ||
| Gametes - | ry | ry | |
| Progeny - | rryy | ||
| Wrinkled, green | |||
| (d) Parents - | RRYY | × | rryy |
| Round, yellow | Wrinkled, green | ||
| Gametes - | RY | ry | |
| Progeny - | RrYy | ||
| Round, yellow |
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संबंधित प्रश्न
Appearance of new combinations in F2 generation in a dihybrid cross proves the law of_____________ .
- dominance
- segregation
- independent assortment
- purity of gametes
State Mendel’s law of Dominance.
Explain the following terms:
Laws of Inheritance
A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness .
(i) Who is colour blind in parents - Father or Mother?
(ii) How many daughters and sons have beeen born in the family?
(iii) What does the child 1 indicate about this trait?
(iv) Complete the depiction of all probabilities of the trait among the children 2-5 in the chart.
(v) On which chromosome is the gene of this trait located?
(vi) Name one other trait in humans which follows the similar mode of inheritance.
9 : 3 : 3 : 1 ratio is due to ______
In a monohybrid cross between two heterozygous individuals, percentage of pure homozygous individuals obtained in F1 generation will be ______.
Read the following and answer from given below:
Prashant wanted to find the genotype of a pea plant bearing purple coloured flowers in his kitchen garden. For this, he crossed purple-flowered plants with white-flowered plants. As a result, all plants which were produced had purple flowers only. Upon selfing these plants, 75 purple flower plants and 25 white flowers plants were produced. Now, he can determine the genotype of a purple-flowered plant by crossing it with a white-flowered plant.
The character i.e., the purple colour of the flowers that appeared in the first filial generation is called ______
If a cross between two individuals produces offspring with 50% dominant character (A) and 50% recessive character (a) then the Genotypes of parents are:
The maternal grandfather of a boy is colorblind, but his maternal grandmother is normal. The father of the boy is also normal. What is the probability of this boy being colorblind?
A male plant bearing red flowers was crossed with a female plant bearing yellow flowers. In the F1 generation, all the flowers were orange in colour.
Mention the ratio of red flowers, yellow flowers and orange flowers in the F2 generation.
