3.08 - Plant Propagation/Reproduction

Across

1. The lower part of the stem of a germinating seed that connects the root system to the cotyledons.
4. The fusion of a sperm cell and an egg cell to form a zygote.
7. A cell or organism that has one set of chromosomes.
8. A genetic condition in which an organism has two different alleles for a particular gene.
11. A cell or organism that has two sets of chromosomes.
12. The transfer of pollen from the male reproductive organ to the female reproductive organ of the same flower or plant.
13. A change in the DNA sequence of a gene that can lead to a new trait or characteristic in an organism.
14. Fertilization A process in which one sperm cell fertilizes the egg cell to form the embryo, while the other sperm cell fertilizes the central cell to form the endosperm.
16. A genetic condition in which an organism has two identical alleles for a particular gene.
18. Agents that can cause mutations in the DNA of an organism.
21. A state of inactivity that some plants enter to survive periods of unfavorable conditions.
22. The structure in a plant's ovary that contains the female gamete or egg cell.
23. A type of cell division that reduces the number of chromosomes in a cell by half.
27. Reproduction A type of reproduction in which two gametes (usually from different plants) fuse to form a new organism.
30. A type of underground stem that grows horizontally and can produce new plants at the nodes.
31. The developing plant inside a seed.
32. Nucleus The nucleus of the central cell in a plant's ovule that fuses with a sperm cell during double fertilization to form the endosperm.
34. The male reproductive cells of a plant that are responsible for fertilizing the female reproductive cells.
35. A type of plant that has three sets of chromosomes instead of the usual two sets.
37. A method of plant propagation that involves bending a stem to the ground and covering it with soil so that it will grow roots and form a new plant.
39. A form of asexual reproduction in which a new plant grows from a small projection or bud on the parent plant.

Down

2. A type of plant that has four sets of chromosomes instead of the usual two sets.
3. A type of asexual propagation that involves taking a stem or leaf from a plant and growing a new plant from it.
5. Small plants that develop from the tissue of the parent plant, usually at the base of the stem or in the axils.
6. A genetic trait that is expressed when only one copy of the gene is present.
9. A method of plant propagation that involves joining two plant parts together so that they grow as one plant.
10. Pieces of a plant that are used to start new plants in tissue culture.
14. A method of plant propagation that involves separating a plant into two or more parts and then growing each part into a new plant.
15. A type of plant reproduction that does not involve the fusion of gametes.
17. A type of haploid cell that develops into a female gametophyte in plants.
18. A small opening in a plant's ovule through which the pollen tube grows to reach the egg cell.
19. The embryonic shoot of a plant that develops into the stem and leaves.
20. A type of haploid cell that develops into a male gametophyte in plants.
24. The embryonic root of a plant that develops into the root system.
25. The ability of a seed or plant to grow and develop under normal conditions.
26. A plant that is the result of crossbreeding two different species or varieties of plants.
27. A small piece of a plant that is grafted onto a rootstock to form a new plant.
28. The transfer of pollen from the male reproductive organ of one plant to the female reproductive organ of another plant of the same species.
29. A genetic trait that is only expressed when two copies of the gene are present.
33. A type of underground storage organ that looks like a bulb but has a solid center.
36. The female reproductive organ of a flower that contains the ovules.
38. A type of underground storage organ made up of layers of fleshy leaves or scales that can produce new plants.