• Mendel proposed that each characteristic trait is determined by:

Answer: two alleles

• The law of segregation states that each gamete carries:

Answer: only one of the two alleles

• Mendel’s Law of Segregation is also known as:

Answer:  Law of purity of gametes

• The Law of Independent Assortment is best demonstrated by a:

Answer: Dihybrid cross

• The law of Segregation states that, during gamete formation:

Answer: Two alleles separate

• According to the law of Segregation, how many alleles does the offspring inherit from each parent?

Answer: One allele

• The physical appearance of an organism for a specific trait is called its:

Answer: Phenotype

• Which of the following is a dominant trait in garden peas according to Mendel?

Answer:  Tall plant height

• Which of the following is a recessive trait in garden peas according to Mendel?

Answer: White flower color

• Which of the following is a dominant trait in garden peas according to Mendel?

Answer:  Yellow seed

• Which law states that in a heterozygote, one trait conceals presence of other for same characteristic?

Answer: Law of Dominance

• What is the term for different forms of a gene?

Answer: allele

• Genotype of an organism refers to:

Answer: The genetic makeup

• Phenotype refers to an organism’s:

Answer: physical appearance

• Which of the following represents the genotype for homozygous recessive?

Answer: aa

• In human beings the sex chromosomes for males is:

Answer: XY

• A Punnett square is used to determine the :

Answer: probability of inheriting certain traits

• This principle states that alleles separate during gamete formation:

Answer:  Law of segregation

• Which genotype is homozygous dominant?

Answer: BB

• When you cross two parent plants, the proportions of flower colors that could appear in offspring is:

Answer: phenotype ratio

• If a pea plant has one allele for tallness (T) and one for shortness (t), what is its genotype?

Answer: Tt

• If gene B gives brown eyes and gene b gives blue eyes, what will be the eye color of a person having Bb:

Answer:  Brown

• If gene B gives brown eyes and gene b gives blue eyes, what will be the eye color of a person having bb:

Answer:  Blue

• If gene B gives brown eyes and gene b gives blue eyes, what will be the eye color of a person having BB:

Answer: Brown

• If the blood group of both the parents is AB, then the possible blood group of the children will be:

Answer: A, B and AB;c

• In human beings the sex chromosomes for males is:

Answer:  XY

QUETIONS ON MONOHYBRID PUNNETT SQUARES

Make a Punnett square to determine the F1 generation when pea plants with heterozygous(Rr) round seeds are self fertilized.

Genotype ratio is 1:2:1      Phenotype ratio is 3:1  round :wrinkled  

       Make a Punnett square when a pea plant with heterozygous(Yy) yellow seeds is crossed with a pea plant with homozygous(yy) green seeds.

Genotype ratio is 3:1      Phenotype ratio is 3:1  yellow : green

If a pea plant which has homozygous(PP) purple flowers is crossed with a heterozygous(Pp) purple flowers what will be the possible offsprings?       

Genotype ratio is 1:1      Phenotype ratio is 1  All purple flowers

What will be result in F1 generation when a pea plant with homozygous(PP) purple flowers is crossed with a pea plant with homozygous(pp) white flowers?

Genotype ratio is 1      Phenotype ratio is 1  All purple flowers    

DIHYBRID PUNNETT SQUARES

Pea plants having yellow round peas (YyRr) were self pollinated. Find the phenotype of F1 generation.

YyRr  x YyRr

Phenotype ratio is 9:3:3:1

yellow and round:yellow and wrinkled:green and round:green and wrinkled