Haploid refers to a cell that has has only one copy of each chromosome, like in a gamete such as a sperm cell or egg cell. Upon fertilization, the two haploids come together to form a full diploid cell (two copies of each chromosome) which then goes on to form the complete organism. Monosomy refers to a condition where there is only one copy of a specific chromosome. For example, in the human condition Turner Syndrome, there is only one X chromosome, instead of two sex chromosomes. Most incidences of monosomy other than Turner Syndrome are lethal, so there aren't many examples of it.
By using ratios. You get a punnet square and then get the ratio or even the percentage.
Here are a list of some limiting factors hope it helps!
• Light
• Water
• Space
• Food
• Temperature
• Predators
• Pollution
• Disease