When an invertebrate reaches the stage, it most likely stops growing and can begin reproduction. beginning growth adult death

adult

Invertebrates are the animals that do not possess a vertebral column. The examples of invertebrates includes arthropods, annelids, cnidarians and mollusks. Invertebrates are the largest class of organisms. They consists of three common parts called as head, thorax and abdomen. The structure restricts any change in the size or length after reaching the adult stage.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides