Mendel studied seven traits of pea plants controlled by genes. On how many different chromosomes are these genes located?

How are the seven traits selected by Mendel distributed across the four chromosomes?

Gregor Mendel conducted his hybridization experiments on garden peas for ......... years.

Blue-flowered and white-flowered plants on crossing gave progeny of blue and white-flowered in the ratio of $60 : 40$. What ratio of blue and white is expected if the blue-flowered plants are self-pollinated?

Statement-$I$: The segregation of alleles is a random process and so there is a $50\%$ chance of a gamete containing either allele.
Statement-$II$: Alleles do not show any blending at either $F_1$ or $F_2$ generation.

Which of the following traits of pea plants studied by Mendel was recessive?