171.

Mutations can be induced with

• IAA

• ethylene

• gamma radiations

• gamma radiations

peptide synthesis inside a cell takes place in 

• mitochondria

• chromoplast

• ribosomes 

• ribosomes 

Test cross in plants of in Drosophila involves crossing 

• Between two genotypes with recessive trait

• Between two F₁ hybrids

• the F₁ hybrid with a double recessive genotype

• the F₁ hybrid with a double recessive genotype

Sweet potato is homologous to 

• potato

• colocasia

• ginger

• ginger

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

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

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

• test cross

• dihybrid cross

• pedigree analysis

• pedigree analysis

Select the correct statement from the ones given below with respect to dihybrid cross. 

• Tightly linked genes on the same chromosome show higher recombinations

• Genes far apart on the same chromosome show very few recombinations

• Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones.

• Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones.

Which one of the following symbols and its representation, used in human pedigree analysis is correct?

•  = Mating between relatives

•  = unaffected male

•  = Unaffected female

•  = Unaffected female