What are 4 Steps to complete a punnet square?

1. Create a key showing traits

2. Make a list of possible allele combinations. & the phenotypes that each would have.

3. Identify the parents that are being used

4. Draw a Punnett square to determine the genotypes and phenotypes.

hope this helps!!:)

Explanation:

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.