Evolution of sex chromosomes The theory outlined here explains the evolution of a rarely recombining chromosome region containing the sex determining genes, an incipient sex chromosome system. The development of male and female regenerants by in-vitro androgenesis in dioecious plant Melandrium album.
The pistil usually is located in the center of the flower and is made up of three parts: the stigmastyleand ovary.
Chromosoma Berl99 : — Pollen is spread from flower to flower by bees. The high frequency of chromosome rearrangements in this species Wilby and Parker,and variability of its Y chromosome morphology Wilby and Parker,are consistent with such a possibility, but it has not yet been tested.
EMBO J18 : — Sex inheritance and sex chromosomes in plants are strikingly similar to those in animals. Plants and other eukaryotes, however, go about things male sex cell in a flower in Hawaii.
The style leads to the ovary that contains the female egg cells called ovules. Plant Mol Biol Reporter , 9 : — Evolution , 53 : 63— Pollen, or flower sperm, is a fine to coarse powder consisting of microgametophytes pollen grains , which carry the male gametes of seed plants.
Genetics , 48 : —