Which of the following statements is true? 1.all genes are dominant.\ 2.a hybrid organisms has one recessive gene and one dominant gene. 3.genotype is the expression of a trait. 4.only pea plants with two dominant genes for tallness will have a tall phenotype.

Explanation:

Chromosomes are made up of genes and a gene is made up of two copies of alleles. If an organism has two different types of alleles on its chromosomes then it's a hybrid organism else we call it a pure organism/trait.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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