If a cross between pure red and pure white flowered pea plants produces $120$ pea plants,what will be the ratio of the progeny?

Discuss the genetic basis of the wrinkled phenotype of pea seed.

Read the following statements.
Statement $I$: In a typical test cross, an organism showing a dominant phenotype is crossed with the recessive parent.
Statement $II$: The ratio of organisms showing dominant and recessive traits in $F_1$ generation of a test cross indicates that the organism with unknown genotype is homozygous dominant.
Choose the correct option.

Mendel selected ....... true-breeding pea plant varieties.

Mendel published his work on the inheritance of characters in .......... but it remained unrecognized until the year ........ for several reasons.

Which of the following is $NOT$ one of the seven pairs of contrasting traits studied by Mendel in pea plants?