Term
|
Definition
Fertilization occurs in flowering plants when the male pollen or gametophyte, assisted by various agents, pollinates the ovum, a process that can occur within one flower or between the flowers of the same or different plants
|
|
|
Term
|
Definition
is the process by which pollen from a plant's anther is transferred to another plant's stigma. This transferral fertilises the plant and the plant then goes on to reproduce (for example, produce seeds). |
|
|
Term
Describe double fertilization? |
|
Definition
- refers to when flowering plants contain two sperm cells that each fertilize a different cell.
-involves the fusion of two sperm cell nuclei of the male gametophyte with two cell nuclei of female gametophyte. One sperm fuses with the haploid egg cell to form the zygote; the other sperm unites with the diploid central cell to form a triploid cell that will develop to an endosperm. |
|
|
Term
|
Definition
-is the tissue produced inside the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form ofstarch, though it can also contain oils and protein. This can make endosperm a source of nutrition in human diet.
-tissue that surrounds and nourishes the embryo in the angiosperm seed. The initiation of endosperm is a definitive characteristic of angiosperms and requires the fusion of at least one nucleus in the embryo sac with a sperm nucleus from the pollen grain. |
|
|
Term
Describe the differenttypes of pollination |
|
Definition
CROSS POLLINATION is the transfer of pollen grains from the anther of a flower to the stigma of a flower of a different plant of the same species.
& SELF POLLINATION s the transfer of pollen grains from the anther to the stigma of the same flower or of another flower of the same plant.
|
|
|
Term
What is a fruit and what is its function |
|
Definition
-The primary function is to a plant is to scatter seeds.
- is a part of a flowering plant that derives from specific tissues of the flower, one or more ovaries, and in some cases accessory tissues. |
|
|
Term
Define the parts ofthe fruit: endocarp |
|
Definition
The innermost layer of the pericarp that surrounds a seed in a fruit.
-the hard inner layer of the pericarp of many fruits, such as the pit or stone of a cherry, peach, or olive. |
|
|
Term
|
Definition
The middle layer of the pericarp of a fruit, between the endocarp and the exocarp.
-The middle, usually fleshy layer of a fruit wall. |
|
|
Term
|
Definition
The outer layer of the pericarp of a fruit.
-outermost layer of the pericarp of fruits: forms the skin |
|
|
Term
Know specific differences between Mitosis and Meiosis.... |
|
Definition
Mitosis: type of nuclear division resulting in 2 genetically identical daughter cells: Division used in growth
Meiosis: specialized type of nuclear division which results in 4 genetically different daughter cells that have 1/2 the # of chromosomes as the mother cell |
|
|
Term
|
Definition
type of nuclear division resulting in 2 genetically identical daughter cells: Division used in growth |
|
|
Term
|
Definition
specialized type of nuclear division which results in 4 genetically different daughter cells that have 1/2 the # of chromosomes as the mother cell |
|
|
Term
Know each stage of Mitosis including what happens in Interphase: |
|
Definition
I-P-M-A-T
Iterphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis |
|
|
Term
Know each stage of Mitosis including what happens in...
phase: interphase |
|
Definition
cell spends majority of the time in this stage synthesizes molecules, DNA replication |
|
|
Term
Know each stage of Mitosisincluding what happensin phase: prophase |
|
Definition
chromosomes condensed and become visible nuclear membrane disappears |
|
|
Term
Know each stage of Mitosisincluding what happensin phase metaphase: |
|
Definition
chromosomes align in the equational plane of the cell. spindle fibers appear |
|
|
Term
|
Definition
The point on a chromosome by which it is attached to a spindle fiber during cell division.
-sticky part of chromosomes |
|
|
Term
Know each stage of Mitosis including what happens in phase Anaphase: |
|
Definition
chromosomes seperate and pull apart to opposite end of poles b spindle fibers |
|
|
Term
Know each stage of Mitosis including what happens in phase Telophase: |
|
Definition
chromosomes organise themselves and the nuclear envelope develops |
|
|
Term
Know each stage of Mitosis including what happens in phase cytokinesis: |
|
Definition
division of the sytopeasm resulting in 2 genetically identical daughter cells |
|
|
Term
|
Definition
long thin strands of DNA complesed w/ protein |
|
|
Term
where does crossing over occur? Meiosis |
|
Definition
metaphase- induces genetic vataibility |
|
|
Term
In anaphase in Meiosis chromosomes>>> |
|
Definition
go to opposite ends of pole |
|
|
Term
|
Definition
# of chromosomes per body cells |
|
|
Term
Meiosis: 2 nuclear divisions: Meiosis 1 meiosis 2 |
|
Definition
end up with 4 genetically different daughter cells 1/2 of chromosomes |
|
|
Term
stages of Meiosis 2 is like |
|
Definition
|
|
Term
stages of meiosis 2 : cytokinesis |
|
Definition
end with 4 genetically different daughter cells |
|
|
Term
Define allele and know the types... |
|
Definition
alternae forms of genes
Dominate & Recessive |
|
|
Term
|
Definition
trait thats always expressed |
|
|
Term
|
Definition
trait suppressed by dominate alleles |
|
|
Term
Know difference between homozygous and heterozygous genes...
homozygous... |
|
Definition
|
|
Term
Know difference between homozygous and heterozygous genes
heterozygous... |
|
Definition
|
|
Term
|
Definition
|
|
Term
what occur in pairs in diploid organisms
one set given by each parents |
|
Definition
|
|
Term
what determines hereditary characteristics of an organisms |
|
Definition
|
|
Term
what occur in linear sequence on chromosomes |
|
Definition
|
|
Term
what puts DNA sequence together |
|
Definition
|
|
Term
|
Definition
|
|
Term
when can you see a recessive trait? |
|
Definition
|
|
Term
biological engineering... |
|
Definition
it is the only type of engineering applied tto living |
|
|
Term
|
Definition
|
|