A general formula to express the number of gametic chromosomal combinations is included.

An organism has x pairs of chromosomes. This job then derives a general formula to express the number of types of gametic chromosomal combinations possible in this organism.

Chromosomal types of embryo and endosperm are noted.

A plant with chromosomal type xx pollinates with another plant that has chromosomal type XX. In the resulting seed, what chromosomal type/types of embryo and endosperm can be expected? Ideas are expressed.

Gametic chromosomal combinations of Avena stirigosa are figured.

Avena stirigosa [oats] is a diploid species with 2n=14 chromosomes. How many different types of gametic combinations can form in this species?

Probability in genetics is the feature topic.

If two heterozygous brown rabbits are crossed, what would be the probability of the first three baby rabbits being brown, white, brown or white, brown, white? Explanations are included.

Calculating phenotypic ratio in dihybrid crosses is achieved.

In garden peas, yellow seed color is dominant over green, and round seed shape dominant over wrinkled. What phenotypic ratio can be expected in F2 from a cross between pure yellow and round with green and wrinkled? What would be the ratio of yellow: green and round: wrinkled? Ideas are included.