Tag: genetics

The ability of a gene to have a multiple phenotypic effects is known as pleiotrophy and the gene is called Pleiotropic gene and the inheritance is called Pleiotropic inheritance. In Drosophila, a gene is responsible in controlling the colour of the eye and depigmentation of body parts. It is a pleiotropic gene.

So, the correct option is ‘Pleiotropic gene’.

a)Dominance – In a heterozygous organism only one allele express itself

b)Codominance – in a heterozygous organism both alleles express themselves fully

c)Pleiotrophy – A single gene influences many characters.

d)Polygenic inheritance – Many genes govern a single character.

So, the correct option is ‘a-ii b-iii c-iv d-I’.

A.Sickel cell anaemia – Pleiotropic alleles

B.Cystic fibrosis – Pleiotropic alleles

C.Phenylketonuria – it is autosomal recessive disorder.

D.Erythroblastosis foetalis – It is also called hemolytic disease of the newborn, type of anemia in which the red blood cells (erythrocytes) of a foetus are destroyed in a maternal immune reaction resulting from a blood group incompatibility between the foetus and its mother.

So, the correct option is ‘Erythroblastosis foetalis’.

A.Complmentary genes - Two genes present on separate loci that interact together to produce a dominant phenotype is called Complementary gene.

B.Pseudogenes – Genomic DNA sequences similar to normal genes but non-functional; they are regarded as defunct relatives of functional genes.

C.Pleiotrophic genes - The ability of a gene to have a multiple phenotypic effects is known as pleiotrophy and the gene is called Pleiotropic gene and the inheritance is called Pleiotropic inheritance. Eg:Sickle cell anaemia.

D.Cistrons – Functional parts of the DNA is called Cistron.

So, the correct option is ‘Pleiotropic genes’.

The ability of a gene to have multiple phenotypic effects or as it influences a number of characters simultaneously is pleiotrophy and the genes are called Pleiotropic genes.

So, the correct option ‘Multiple phenotypes’.

The ability of a gene to have a multiple phenotypic effects is known as pleiotrophy and the gene is called Pleiotropic gene and the inheritance is called Pleiotropic inheritance.

eg:Sickel cell anaemia

So, the correct option is ‘sickle cell anaemia’.

The gene having multiple phenotypic effects is called pleiotropic genes. Eg: Sickel cell anaemia. This is caused by a gene HbS. When it is a homozygous condition, sickle cell anaemia occurs or if it is in the homozygous condition, act as a carrier.

So, the correct option is 'Hb^S’