A ______________is the basic unit of

inheritance which consists of a DNA segment located on a specific locus of a chromosome.

An __________________ is an alternative

form of a gene for a specific trait that is located on the same locus of

a pair of homologous chromosomes.

A _________________is a

heritable feature such as height, eye colour, blood group and presence of dimples.

A ________________ is a variation of a

specific characteristic. Each inherited characteristic consists of a specific trait.

_______________ is an allele

which always shows its trait when it is present, and suppresses the effect of recessive allele.

_________________ is an allele which shows its trait when

both alleles are recessive allele

__________________ is expressed when both alleles are dominant alleles or one dominant allele is paired with a recessive allele.

_________________ is expressed if a recessive allele is paired with another recessive allele.

Recessive trait is expressed if a recessive allele is paired with another recessive allele is known as

Alleles at loci of a pair of

homologous chromosomes

are different is known as

_______________ refers

to the first generation of

two individuals which are

mated to predict or analyse

genotypes of their offsprings

_________________refers to

a successive generation as

a result of mating between

individuals of purebreed

parental generation.

_________________refers to

individual which carries two identical alleles for

a trait. Self-cross always produces offsprings with the same characteristics in every generation.

_____________is the product

of mating between two purebreed varieties.

_______________ is the observable characteristic of

an organism. For example, height.

____________is the genetic composition of an

organism that cannot be seen.

Diagram 1 shows the inheritance of

flower colour in pure breeding. Which

flower, A, B, C or D is homozygous

dominant?

Diagram 3 shows the Punnet square used to determine the F1 generation when two tall plants were crosssed. What is the percentage of heterozygous tall plants obtained?

What is the phenotype of the offsprings in F1 generation in a monohybrid cross between RR X rr?