In Mendelian experiments,which of the following traits is dominant?

Gregor Mendel was a native of which country?

Assertion: The genetic complement of an organism is called genotype.
Reason: Genotype is the type of hereditary properties of an organism.

$A$ black hybrid mouse is crossed with a pure brown mouse to produce a total of $24$ young ones. Which of the following result is most likely to be correct?

Mendel studied several traits in pea plants. Which of the following combinations represents the traits he studied?

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.