QQuestion
Determine the nature of the pea plant germinated from the seed produced as a result of pollination between a hybrid tall (Tt) and a pure dwarf (tt) pea plant:
(a) 100% Tall
(b) 50% Tall, 50% Dwarf
(c) 100% Dwarf
(d) 75% Tall, 25% Dwarf
✓Answer
(b) 50% Tall, 50% Dwarf
Explanation
A hybrid tall plant (Tt) crossed with a pure dwarf (tt) results in a 1:1 ratio of genotypes Tt (tall) and tt (dwarf). Hence, 50% of offspring will be tall and 50% dwarf.
Related Questions
More WBBSE Moderate level questions
As the gene responsible for haemophilia is recessive, so the symptoms of this disease is only manifested in ____ condition.
Identify the genotype of guineapig having white coat colour and rough hair — (a) bbRR, bbrr (b) BBRR, bbrr (c) bbRR, bbRr (d) BbRr, BbRR
Predict what would be the hereditary results in the following cases: One of the parents is thalassaemic and the other is a carrier of the thalassaemic gene. Both of the parents are carriers of the thalassaemic gene What are the symptoms of Thalassaemia? OR Tabulate three pairs of opposite traits regarding the seed of the pea plant as selected by Mendel. Show the process of sex determination in men with the help of a checkerboard.
Write two causes behind Mendel's success in conducting experiments on heredity.
Prove the authenticity of the statement — "The phenotypic and genotypic ratio remain identical in case of Incomplete Dominance".
Match the words in column-A with the most appropriate words in column B and re-write the correct pair mentioning the serial no. of both columns Column-A Column-B 1. Diabetes insipidus (a) Law of Independent Assortment 2. Schwann cell (b) Brittleness of bone 3. Meiosis (c) Exists between neurolemma and myelin sheath of axon 4. Senescence phase (d) Hyposecretion of ADH 5. Genetic disease (e) Spore mother cell and germ mother cell 6. The second law of Mendel (f) Colour blindness
In which of the following crosses, will the F1 generation seed's tall and dwarf traits appear in a 1:1 ratio? (a) Tt x Tt (b) TT x Tt (c) TT x tt (d) Tt x tt
What will be the phenotypic ratio of progeny obtained from the hybridization between YyRR and YYrr genotypes? (a) 2:1 (b) 1:2 (c) 2:2 (d) 1:4
If a population undergoes three generations, and if each generation consists of only males, what is the probability that females will be present in the fourth generation? (a) 100% (b) 0% (c) 50% (d) 75%
What is the numerical ratio of the four genotypes BBRR, BBrr, bbRR and bbrr produced in the F2-generation resulting from dihybrid cross in Guinea pig? (a) 1 : 1 : 1 : 1 (b) 2 : 4 : 2 : 4 (c) 4 : 2 : 2 : 1 (d) 2 : 4 : 1 : 2
In spite of being pure in respect of one trait, what else could an organism be in respect of another trait?
Which would be the genotypic and phenotypic ratio in the F2 generation of a hybrid cross in case of incomplete dominance? (a) 2 : 1 : 1 (b) 1 : 1 : 1 (c) 1 : 2 : 1 (d) 1 : 2 : 2