Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct? 

• Yeast - statins

• Acetobacter aceti - acid

• Clostridium Butulicum - lactic acid

• Clostridium Butulicum - lactic acid

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 recessive

• Alleles do not show any blending and both the characters recover as such in F₂ generation

• Alleles do not show any blending and both the characters recover as such in F₂ generation

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

• Two X - chromosomes 

• Only one Y- chromosomes

• Only one X - chromosome

• Only one X - chromosome

The genotype of plant showing the dominant phenotype can be determined by 

• test cross

• dihybrid cross

• pedigree analysis

• pedigree analysis

Sweet potato is homologous to 

• potato

• colocasia

• ginger

• ginger