Round seed trait (R) is dominant over wrinkled (r) seed trait in Pea. Heterozygous round seeded plant (Rr) is crossed with wrinkled seed plant (rr). What is the possible progeny?
1. 302 round : 102 wrinkled
2. 210 round : 95 wrinkled
3. 103 round : 99 wrinkled
4. 103 round : 315 wrinkled
Indentify the incorrect statement:
1. Tall plant produce gametes by meiosis and the dwarf plants by mitosis.
2. Only one allele is transmitted to a gamete.
3. The segregation of alleles is a random process.
4. Gametes will always be pure for the trait.
In a monohybrid cross F1 progeny resemble neither of the parents. What would be true in this case?
1. The parental traits would not appear in any of the F2 -progenies
2. The F2 phenotypic ratio will be different from the F2 genotypic ratio
3. It could be a case of incomplete dominance
4. The F2 phenotypic ratio will be similar to any Mendelian monohybrid cross
One of the Mendel's pure strains of pea plants had green peas. How many different types of eggs could such a plant produce with regard to pea color?
1. 1
2. 2
3. 4
4. 8
A true breeding plant is
(1) one that is able to breed on its own
(2) produced due to cross-pollination among unrelated plants
(3) near homozugous and produces offspring of its own kind
(4) always homozygous recessive in its genetic constitution
A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of
(1) 1 : 2 : 1 :: Tall heterozygous : tall homozygous : Dwarf
(2) 3 : 1 :: Tall : Dwarf
(3) 3 : 1 :: Dwarf : Tall
(4) 1 : 2 : 1 :: Tall homozygous : Tall heterogygous : Dwarf
Alleles are
1. different phenotype
2. true breeding homozygotes
3. different molecular forms of a gene
4. heterozygotes
In pea plants, yellow seeds are dominant to green. If heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green plants would you expect in F1 generation ?
(1) 50 : 50
(2) 9 : 1
(3) 1 : 3
(4) 3 : 1
Phenotype of an organism is the result of :
(1) mutations and linkages
(2) cytoplasmic effects and nutrition
(3) environmental changes and sexual dimorphism
(4) genotype and environmental interactions.
An inherited character and its detectable variant is termed as
(1) unit factor
(2) trait
(3) genetic profile
(4) genotypic charcter