The most likely explanation for the variation is the offspring were produced from different combination of genes. A single pair of gold fish mentioned in the question means a male and a female gold fish. The two of them mated and contributed different genes to the fertilized fish eggs, this results in production of various body shape and colouration which is known as variation.
Answer:
Dihybrid
Explanation:
A dihybrid cross explores the interaction of two traits in affecting the genotype of the offsping
Answer:
Cross-pollination.............
The answer is mutation
of genes. The mutations were beneficial and gave the individuals of the population
advantage and hence increased their survival. The classic features of birds
evolved one by one and gave birds advantage over their dinosaurs counterparts, especially the feature of small size.
Answer:
Cell theory
Explanation:
Also known as the cell membrane.
