how are genes expressed for a particular trait.

how are genes expressed for a particular trait?

Genes are expressed in two ways which could be either genotype or phenotype

genotype reflects the dominancy or recessives of a particular trait over another while phenotype entails the physical expression of such trait which could be height, color of skin among others

e.g

If P is purple while p is white

PP x Pp= PP, Pp, PP. Pp these are the genotype produced from the crossing of two parents which results into 2 homozygous gene and 2 heterozygous gene without any recessive gene

while the phenotype shows that all the offspring are Purple

Explanation:

a time line cause it goes from 685 to 978

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: