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CONTINUOUS ORGANS. “Vegetative organ systems differentiate continuously from root and shoot meristematic regions that are formed initially during embryogenesis.” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

INDEPENDENT EXISTENCE. “Postembryonic development begins after the emergence of the embryo from the egg and embryonic membranes, when the organism becomes capable of active feeding and locomotion.” http://encyclopedia2.thefreedictionary.com/Postembryonic+Development View in LinkedIn

MORPHOGENESIS. “Most morphogenic events in flowering plants occur in the postembryonic sporophyte after seed germination.” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

DIPLOID SPOROPHYTE. “By contrast, the diploid, or sporophytic, generation begins after fertilization with the zygote and forms the mature plant with vegetative organs (leaf, stem, root) and flowers that contain the reproductive organs (anther and pistil).” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

HAPLOID GAMETOPHYTE. “The haploid, or gametophytic generation, begins after meiosis with spores that undergo mitosis and differentiate into either a pollen grain (male gametophyte) or an embryo sac (female gametophyte). The male and female gametophytes are derived from specialized spore-forming cells within the reproductive organs of the flower.” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

ALTERNATION OF GENERATIONS. “The flowering plant life cycle is divided into haploid and diploid generations that are dependent on each other.” https://lnkd.in/g_k-4-g View in LinkedIn

DEAD-END. "Highly differentiated sex chromosomes—a degenerate, gene-poor Y chromosome, and an often dosage-compensated X—appear to represent an evolutionary dead-end." https://lnkd.in/dX2rADH View in LinkedIn

"FUSIONS between sex chromosomes and autosomes are relatively easy to detect from karyotypic data, and a large number of such fusions have been discovered." https://lnkd.in/g2CPWtY View in LinkedIn

"AN AUTOSOME is a chromosome that is not an allosome (a sex chromosome). Autosomes appear in pairs whose members have the same form but differ from other pairs in a diploid cell, whereas members of an allosome pair may differ from one another and thereby determine sex." https://lnkd.in/gP9J5mi View in LinkedIn

BOTH SYSTEMS AT ONCE. "In some taxa, such as fishes and squamate reptiles, both XY and ZW sex determination is found among closely related species (and even among populations within a species)." https://lnkd.in/g2CPWtY View in LinkedIn