Inheritance of flower colour is an example of incomplete dominance, which is seen in
Antrirrhinum
Pisum
Solanum
Hibiscus
A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc × AaBbCcm, the phenotypic ratio of the offsprings was observed as 1: 6 : x : 20 : x : 6 : 1.
3
9
15
25
How many pairs of contrasting characters in pea pod were chosen by Mendel?
5
7
Allelism refers to
genic interactions controlling a character
multiple genes controlling a character
expression of many characters by a single gene
alternative forms of a gene at a given locus
Multiple phenotype seen in
pleiotropy
incomplete dominance
multiple allelism
polygenic inheritance
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
The discrete unit controlling a particular character is called a factor
Out of one pair of factors one is dominant, and the other is recessive
Alleles do not show any blending and both the characters recover as such in F2 generation
Factors occur in pairs
Genotypic and phenotypic ratio in monohybrid cross remains same in case of
sex linked genes
pseudoallelic genes
intermediate inheritance
dominant and recessive genes
If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be.
both homozygous
one homozygous and other heterozygous
both heterozygous
both hemizygous
The F1 generation has all tall, and F2 ratio is 3 : 1, it proves.
law of dominance
independent assortment
law of segregation
linkage
Alleles are
alternate forms of a gene
homologous chromosome
pair of sex chromosome
none of the above
