Related InterviewSolutions

• ABO blood group is determined by three different alleles. How many genotypes and phenotypes are possible?A. `{:(,"Genotype",,"Phenotype"),((a),6,"",4):}`B. `{:(,"Genotype",,"Phenotype"),((b),3,"",1):}`C. `{:(,"Genotype",,"Phenotype"),((c),4,"",6):}`D. `{:(,"Genotype",,"Phenotype"),((d),9,"",7):}`
• In a back cross, a `F_(1)` hydrid is crossed with dominant parent , the offsprings :A. All will be tallB. 3 tall : 1 shortC. 1 tall : 1 shortD. 1 tall : 3 short
• The gene intraction when on egenes masks the effect or When a gene pair hides the effect of another, the phenomenon is calledA. epistatic factorB. duplicate factorC. complementary factorD. supplementary factor
• In a genetic cross having recessive epistasis, `"F"_(2)` phenotypic ratio would be:A. `12 : 3 : 1`B. `15 : 1`C. `9 : 6 : 1`D. `9 : 3 : 4`
• The gene which suppresses and masks the expression of other is:A. recessiveB. epistasisC. co-dominantD. complementary
• Recessive epistasis is defined as:A. a situation in which a gene pair in homozygous recessive condition masks the effect of one or both the member of another gene pairB. a situation in which the dominant allele of the first gene pair masks the effect of both the members of the second gene pair and the dominant allele of the second gene pair masks the effect of both the members of the first gene pairC. a situation in which one allele does not allow its alternative form to expressD. a situation in which the dominant allele of one gene pair masks the effect of both members of another gene pair
• In shortorn cattle genes for red `(r_(1))`and white `(r_(2))` coat colour occcur. Crosses between red `(r_(1)r_(2))` and white `(r_(2)r_(2))` produced `(r_(1)r_(2))` roan. This an example ofA. epistasisB. co-dominanceC. complementary genesD. incomplete dominance
• Sometimes a gene masks the expression of another, gene at a different locus. This phenomenon is known as:A. epistasisB. co-dominanceC. incomplete dominanceD. none of these
• A gene whose phenotypic effect kills the bearer is called:A. lethalB. pleiotropicC. supplementaryD. complementary
• Which of the following crosses and resultant phenotypic ratios are mismatched?A. `{:(,"Cross",,"Phenotypic ratio"),((a),"Tt"xx"Tt",-,3:1):}`B. `{:(,"Cross",,"Phenotypic ratio"),((b),"tt"xx"Tt",-,2:1):}`C. `{:(,"Cross",,"Phenotypic ratio"),((c),"TtYy"xx"ttyy",-,1:1:1:1):}`D. `{:(,"Cross",,"Phenotypic ratio"),((d),"TtYy"xx"TtYy",-,9:3:3:1):}`