LINKAGE
, LINKAGE
• Mendel’s Law of Independent Assortment is considered to be one
the major principles of heredity. But now this law is not considered
be valid for universal application for many reasons.
• It is clear that the number of genes per species far exceeds
number of chromosome pairs and each chromosome must carry m
genes.
• The genes on the given chromosome cannot assort independently
are called linked genes.
• This type of co-existance of 2 or more genes in the same chromoso
is known as linkage.
, LINKAGE
• Linkage is defined as the tendency of 2 or more genes to remain to
in the original combination in the same chromosome during the proc
inheritance for a number of generations.
• Linkage was discovered by T. H. Morgan.
• Linkage was found in Drosophila (body colour and nature of win
located on the same chromosome), sweet pea (flower colour and
the pollen grains are linked), maize (colour and shape of seeds are
and man (Haemophilia and colour blindness are linked).
• T. H Morgan (1911) proposed the theory of linkage based o
experiments in Drosophila.
, LINKAGE
• Mendel’s Law of Independent Assortment is considered to be one
the major principles of heredity. But now this law is not considered
be valid for universal application for many reasons.
• It is clear that the number of genes per species far exceeds
number of chromosome pairs and each chromosome must carry m
genes.
• The genes on the given chromosome cannot assort independently
are called linked genes.
• This type of co-existance of 2 or more genes in the same chromoso
is known as linkage.
, LINKAGE
• Linkage is defined as the tendency of 2 or more genes to remain to
in the original combination in the same chromosome during the proc
inheritance for a number of generations.
• Linkage was discovered by T. H. Morgan.
• Linkage was found in Drosophila (body colour and nature of win
located on the same chromosome), sweet pea (flower colour and
the pollen grains are linked), maize (colour and shape of seeds are
and man (Haemophilia and colour blindness are linked).
• T. H Morgan (1911) proposed the theory of linkage based o
experiments in Drosophila.
