What are the dominant and recessive traits regarding the character related to the colour of flower of Pea plant?
(a) Purple and Green
(b) Purple and White
(c) White and Purple
(d) Purple and Yellow
WBBSE
Class X
Life Science
03 (a) Heredity
01 Mark
2024
(b) Purple and White
Explanation:
In pea plants, the flower colour character has two contrasting traits: purple and white. Among these, purple flower colour is dominant, meaning it is expressed even when inherited in one copy. White flower colour is recessive and is expressed only when both alleles are for white flowers (homozygous recessive). This dominant-recessive inheritance pattern was first discovered by Gregor Mendel in his classic experiments on pea plants, forming the basis of Mendelian genetics.
Related Questions
More WBBSE Easy level questions
1/12
Q.
What is the difference between the two genes responsible for the expression of attached ear...
A.
The gene for attached ear lobes and the gene for roller tongue...
Q.
The Guinea pig having the genotype BbRr is heterozygous for both the loci. State True...
A.
True. Explanation: An organism is said to be heterozygous at a gene...
Q.
The cause of biodiversity on earth is ____ .
A.
The cause of biodiversity on earth is variation. Explanation: Biodiversity refers to...
Q.
With the help of a checkerboard show the phenotypic ratio of offsprings produced inF2 generation...
A.
YR Yr yR yr YR YYRR (Yellow round) YYRr (Yellow round) YyRR...
Q.
Explain the following two terms related with heredity — (a) Allele (b) Locus
A.
(a) Allele: Alleles are different forms of the same gene that occupy...
Q.
State True or False: Only one type of gamete is produced from a pea plant...
A.
False Explanation A pea plant with genotype YyRR produces gametes through meiosis....
Q.
The wrinkled shape of seed is a ____ trait.
A.
Recessive Explanation Seed shape in pea plants is a hereditary trait controlled...
Q.
What is the ratio of the number of genotypes BBRr and BBRR produced in the...
A.
(d) 1 : 1 Explanation In a dihybrid cross involving two genes...
Q.
What is a dominant trait?
A.
A dominant trait is the characteristic that is expressed or appears in...
Q.
What is hybridization?
A.
Hybridization is the process of crossing two genetically different organisms to produce...
Q.
State True or False: If any pea plant contains either TT or tt trait, then...
A.
False Explanation: A pea plant with TT or tt alleles is homozygous—TT...
Q.
State True or False: There is no role of female in determining sex of human.
A.
False Explanation: In humans, sex is determined by the combination of sex...