ASSIGNMENT
1. How many kinds of phenotypes would you expect in F2 generation in a monohybrid cross?
2. State a difference between a gene and an allele.
3. During a monohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populatio
were tall and dwarf in equal ratio. Work out a cross to show how it is possible.
4. Find the percentage of homozygous tall in F2 population involving a true breeding tall and a true bre
dwarf pea plant.
,
, Study of heredity and variation or Study of genes
Genetics and chromosomes.
Resemblance between offspring (progenies) and
Heredity
their parents.
Variation Difference between parents and offspring.
Transmission of characters from parents to
Inheritance offspring.
Alleles
The alternative forms of a gene.
(Allelomorphs)
, Dominant The character which is expressed. It indicates
character with capital letter.
Recessive The character which is suppressed. It indicates
character with small letter.
The condition in which chromosome pair carries
Homozygous similar alleles of a gene. E.g. TT, tt, YY, yy etc.
The condition in which chromosome pair carries
Heterozygous dissimilar alleles of a gene. E.g. Tt, Yy etc.
Visible characters (Physical expression) of an
Phenotype individual.
Genotype Genetic constitution of a character.
1. How many kinds of phenotypes would you expect in F2 generation in a monohybrid cross?
2. State a difference between a gene and an allele.
3. During a monohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populatio
were tall and dwarf in equal ratio. Work out a cross to show how it is possible.
4. Find the percentage of homozygous tall in F2 population involving a true breeding tall and a true bre
dwarf pea plant.
,
, Study of heredity and variation or Study of genes
Genetics and chromosomes.
Resemblance between offspring (progenies) and
Heredity
their parents.
Variation Difference between parents and offspring.
Transmission of characters from parents to
Inheritance offspring.
Alleles
The alternative forms of a gene.
(Allelomorphs)
, Dominant The character which is expressed. It indicates
character with capital letter.
Recessive The character which is suppressed. It indicates
character with small letter.
The condition in which chromosome pair carries
Homozygous similar alleles of a gene. E.g. TT, tt, YY, yy etc.
The condition in which chromosome pair carries
Heterozygous dissimilar alleles of a gene. E.g. Tt, Yy etc.
Visible characters (Physical expression) of an
Phenotype individual.
Genotype Genetic constitution of a character.
