Chapter 3 genetics for final

Label each thing weenie

A: Pollen grain

B: Pollen tube

C: Two sperm (1n each)

D: Ovary

E: Ovule (containing embryo sac)

F: Egg (1n)

What changes after the pea plant is fertilized?

One sperm unite with the egg, the other sperm unites with the 2 polar nuclei.

Pollen tube turns into micropyle. Central cell turns into endosperm nucleus (3n). Egg turns into zygote (2n).

Law of segregation

T and t are separate from each other. A haploid receives one of them, but not both during meiosis.

What are Mendelian unit factors called?

Genes

Alleles

Different versions of the same gene

Law of independent assortment?

Two different genes will randomly assort their genes during the process that gives rise to gametes.

Product rule

The probability that two or more independent events will occur is equal to the product of their respective probabilities.

What is the Chi square formula?

x²=The sum of (O-E)²/E

O = Observed data in each category

E = expected data in each category based on the experiment’s hypothesis.

What do low/high chi square values indicate?

Low: High probability that the observed deviations are expected.

High: Low probability that the observed deviations are expected.

> or equal to 0.05 = fail to reject hypothesis

< 0.05 = REJECT hypothesis

Do more chi square problems and pedigree thingy