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Minor change in a gene's structure is called:
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as
A pleiotropic gene:
Lack of independent assortment of two genes A and B in the fruit fly Drosophila is due to:
When a cluster of genes shows linkage behaviour they:
Contraceptive oral pills help in birth control by:
In which disorder, change of single base pair in the gene for beta globin chain results in change of glutamic acid to valine?
A human female with Turner's syndrome:
The incorrect statement with regard to Haemophilia is:
According to Mendelism which character is showing dominance:
Which one of the following symbols represents mating between relatives in human pedigree analysis?
The number of contrasting characters studied by Mendel for his experiments was:
Test cross involves:
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by:
A true-breeding plant is:
ABO blood grouping is controlled by gene I which has three alleles and shows co-dominance. There are six genotypes. How many phenotypes in all are possible?
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?
Test cross in plants or in Drosophila involves crossing:
A gene is said to be dominant if: