In pea plants, flower color is controlled by a pair of alleles where purple (p) is dominant to white (p). stem length is controlled by another pair of alleles where tall (t) is dominant to short (t). these two allele pairs segregate independently. suppose you have a pea plant that has purple flowers and tall stems and you wish to carry out a testcross in order to determine its genotype. complete the predictions using the correct terms.
in order to carry out the testcross, you should cross your original pea plant with another pea plant whose phenotype is

white flowers and short stem

Explanation:

A test cross is performed usually to find out the genotype of a dominant phenotype because it can be homozygous or heterozygous. To perform the test cross, the test organism is mated with the recessive phenotype organism. Here, plant having white flowers and short stem (pptt) will be used in test cross. Few examples of test cross results are as follows:

If the original dominant phenotype plant is homozygous for both traits, all the offspring in the next generation will have dominant phenotype:

PPTT X pptt =

        pt

PT  PpTt

If the plant is heterozygous for both traits, four types of offspring will be produced:

PpTt X pptt =

       pt

PT  PpTt

Pt   Pptt

pT  ppTt

pt   pptt

Hence varying results after a test cross can help to determine the genotype of the original plant.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.