There are three types of variation mutation, recombination and immigration so your answer is mutation
The endosymbiosis theory explains how eukaryotic cells may have evolved from prokaryotic cells. Symbiosis is a close relationship between two different organisms.Later, a host cell engulfed a prokaryotic cell capable of photosynthesis. This is where the chloroplast and other plastids originated.
I think either neutral ph or more enzyme
DNA replication and condensation, nuclear membrane degradation, spindle formation, chromosomal segregation and nuclear reformation.
ExplaAnswer:nation:
Answer:
D. Tt with Tt
Explanation:
In the given question, the student wants to study the stem length in the plants which are controlled by the T (dominant) and t (recessive) alleles.
To study the monohybrid cross for the stem length, the student must cross the heterozygous forms of the gene for the trait as it will produce the mixture of variables of height.
cross- Tt x Tt
T t
T TT Tt
t Tt tt
1. Genotype TT - tall height
2. Genotype Tt- tall height
3. Genotype tt- small height
Thus, Option-D is correct answer.