SB015 Topic 4-6 Quiz Set B

An alternative form of a gene that may produce distinct phenotypic effects is known as

• allele
• locus
• genotype
• phenotype

What is meant by locus?

• The set of alleles of an organism
• A position of an allele on a chromosome
• The observable physical traits of an organism
• An alternative form of a gene that occupies the same locus on a pair of homologous chromosomes

Which of the following genotypes is homozygous dominant?

• 
• 
• 
• 

A cross between an individual with the dominant phenotype, but unknown genotype, with an individual with recessive phenotype is

• Self-cross
• Test cross
• Back cross
• Reciprocal cross

In pea plant, purple flower is dominant over white flower. A monohybrid cross between two purple flower heterozygous plants produces F1 generation with phenotypic ratio of

• all purple flower.
• all white flower.
• 1 purple flower : 1 white flower.
• 3 purple flower : 1 white flower.

Which of the following are true-bred genotype?

• I and II only
• I and III only
• II and III only
• I, II and III

State the genotype that would result from the crossing between RR x Rr

• I and II only
• I and III only
• II and III only
• I, II and III

p2 in Hardy-Weinberg equation indicates individuals

• that are heterozygous
• having a lethal allele
• that are homozygous dominant
• that are homozygous recessive

In which population can genetic drift be observed?

• Small population
• Large population
• Non isolated population
• Nonrandom mating population

Which assumptions are essential for a population to be in the Hardy-Weinberg equilibrium?

• I and II
• I and III
• II and III
• I, II and III