Explain the following two terms related with heredity — (a) Allele (b) Locus

"Some phenotypes may have multiple genotypes and some other phenotypes may have a single genotype" — Justify the statement from the results derived from the dihybrid experiment in the case of the pea plant.

State Mendel's second law of heredity

Which of the following genotypes is completely different from the rest in respect of its phenotype—YYRR, yyRR, YYRr and YyRR?

With the help of a checkerboard show the phenotypic ratio of offsprings produced inF2 generation as a result of a cross between a pea plant having pure round yellow coloured seed and another pea plant having wrinkled green coloured seed. Write Mendel's law of heredity derived from this experiment. [3+2=5] OR Demonstrate a cross for eradication of misconceptions prevailing among human society regarding the process of determination of sex among children. What are the symptoms of thalassaemia? [3+2=5]

What is the difference between the two genes responsible for the expression of attached ear lobes and roller tongue?

The Guinea pig having the genotype BbRr is heterozygous for both the loci.

The cause of biodiversity on earth is ____ .

What are the dominant and recessive traits regarding the character related to the colour of flower of Pea plant? (a) Purple and Green (b) Purple and White (c) White and Purple (d) Purple and Yellow

Only one type of gamete is produced from a pea plant having genotype YyRR

The wrinkled shape of seed is a ____ trait.

What is the ratio of the number of genotypes BBRr and BBRR produced in the F2 generation of dihybrid cross in Guinea pig? (a) 2 : 1 (b) 4 : 1 (c) 1 : 2 (d) 1 : 1