Related Experiment Video
Updated: May 3, 2026

An Efficient Clearing Protocol for the Study of Seed Development in Tomato Solanum lycopersicum L.
Published on: September 7, 2022
Studies of seed development in Pisum sativum : I. Seed size in reciprocal crosses
1John Innes Institute, Colney Lane, NR4 7UH, Norwich, UK.
Abstract:
Variation in cell population size and cell weight in the cotyledons are important factors in determining seed weight in Pisum sativum. The regulation of these parameters as well as that of growth rate has been examined. The use of reciprocal crosses between varieties of contrasting seed size has allowed the recognition of two systems of control-an intrinsic one dependent on the seed's own genotype, and the extrinsic control of the maternal environment. It is shown that the use of particular kinds of crosses can aid in discriminating the separate roles of sinks and sources as determinants of seed size.
Related Concept Videos
Dihybrid Crosses
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Monohybrid Crosses
Seed Structure and Early Development of the Sporophyte
Test Cross
Chi-square Analysis
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...

