Biology Principles Lab II
Fall 2020
Lab Report #2 Fast Plants
Melvin Silberklang
By: Rakeeb Basher
Wisconsin Fast Plants
Abstract
The fast plants' experiment explores Mendel's theory of inheritance, we did so by using
Wisconsin fast plants. This experiment investigates whether the plants have cross-bred while
analyzing the first and second-generation (F1 and F2) offspring. Mendel identified his second
law of inheritance by observing two characters simultaneously. He Crossed two homozygous
parents which produced dihybrids in the F1 generation. A dihybrid cross is between F1 dihybrids,
which can regulate whether two specific characters are transferred to the offspring
simultaneously or separately while conditioning recessive alleles. The phenotypes are
determined, at this stage, and observed P1 was planted and observed for characteristics such as
stem color and leaf color, completing the chi-squared test. The results are gathered by analyzing
the F2 offspring through a chi-squared probability. To replicate Mendel’s results, the data has to
produce the phenotypic ratio of 9:3:3:1. This would also mean that the likelihood of producing
the phenotypic ratio will occur more than 5% out of 100% times.
Introduction
Gregor Mendel came up with the law of segregation and the law of independent
assortment while breeding garden peas. The law of segregation
states that when gametes are
produced, two copies of each hereditary factor from each parent segregate so that offspring
acquire one element. Mendel found that the law of independent assortment
applies to genes with
different nonhomologous chromosomes and sometimes to chromosomes that are far apart. The
law of segregation is meant to explain how paired alleles separate and end up in two different
gametes while in gamete formation. Each parent’s allele splits into two gametes; the alleles from
each parent produces offspring’s. Every offspring inherits half of their traits from each parent.
These characteristics are combined and passed down to all future generations. The genetics that
is donated from parents' offspring are known as genotypes. F1 generation is the product of P1
and P2 when it is crossed. When F1 plants are produced they show signs of dominant or
recessive alleles, however, the F2 generation may only have recessive alleles. The hypothesis
formulated as phenotypes of two inheritable genotypes under Mendel's law of independent
assortment will assert a ratio of 9:3:3:1 for the phenotypes. The purple stem and green leaves
have the dominant allele, while the non-purple stems with yellow-green leaves are the recessive
allele. In the fast plants experiment, it is predicted that the class data and the collective will
