Anther & Pollen Formation
Term to describe the male reproductive organs of a flowering plant.
What is Androecium?
The location of the embryo sac
What is an ovule?
The transfer of pollen from the anther to the stigma
What is pollination?
An example of interbreeding
What is self fertilization?
Ways Cross fertilisation is promoted
What are self-incompatibility, dichogamy, dioecy, sterility?
These two processes account for the development of pollen in the anther.
What are Microsporogenesis and Microgametogenesis?
The amount of antipodal cells that are in a mature embryo sac.
What is three?
The structure that grows from the pollen grain and carries two male nuclei to the ovule.
What is the pollen tube?
A genetic consequence of interbreeding, in terms of variation.
what is decrease in variation?
Prevents pollen from fertilising flowers of the same plant
What is self-incompatibility?
The microspore mother cells undergo this form of cell division to create 4 daughter microspores.
What is Meiosis?
The type of single nucleus that a mature embryo sac has
What is diploid nucleus?
The process in angiosperms where one male nucleus forms a zygote and the other forms endosperm.
What is double fertilization?
An effect of interbreeding depression
What is the reduction in fitness or health of the offspring?
Kinds of dichogamy
What are protandry and protogyny?
The innermost nutritive layer of the anther.
What is the tapetum?
The amount of haploid nuclei a mature embryo sac contains
What are six haploid nuclei?
The two types of pollination that depend on whether pollen comes from the same plant or a different plant.
What are self-pollination and cross-pollination?
How closely related are the parents in out breeding?
What is At least 4-6 generations apart or different and unrelated plants ?
System where plants have either male or female parts
What is dioecy?
Site of meiosis during pollen formation in the anther.
What are the pollen sacs?
The name of the two cells nearest to the micropyle
What are synergids?
The name of the small opening in the ovule through which the pollen tube enters during fertilization.
What is the micropyle?
Which breeding is more likely to preserve unique traits of th offspring?
what is interbreeding?
Sterility due to failure to produce microgametophytes
What is male sterility?