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
Inheritance of flower colour is an example of incomplete dominance, which is seen in
Antrirrhinum
Pisum
Solanum
Hibiscus
Inheritance of 'ABO' blood group shows
polyploidy
incomplete dominance
multiple allelism
polygeny
When different alleles of the same gene are present on an individual, the individual is a
heterozygous
diploid
homozygous
mosaic
Genes are made up of
histones
hydrocarbons
polynucleotides
lipoproteins
Alleles are
alternate forms of a gene
homologous chromosome
pair of sex chromosome
none of the above
The genotype of a plant showing the dominant phenotype can be determined by
test cross
dihybrid cross
pedigree analysis
back cross
Mendel does not get linkage due to
dominance
independent assortment
segregation
genes on same chromosome
Genetic counselors can identify heterozygous individuals by
height of individuals
colour of individuals
screening procedures
All of these
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
