Asexual and Sexual Reproduction
3. Vocabulary Defined
Vocabulary
- allele
- An alternative form of a gene.
- asexual reproduction
- A form of reproduction in which a new individual is created by only one parent.
- binary fission
- An asexual form of reproduction where a cell splits into two daughter cells.
- crossing-over
- Exchange of DNA segments between homologous chromosomes; occurs during prophase I of meiosis.
- cross-pollination
- Sexual reproduction in plants where sperm from the pollen of one flower is received by the ovary of another flower.
- diploid
- When a cell has two sets of chromosomes.
- gametes
- Cells involved in sexual reproduction; typically egg and sperm cells.
- gonads
- Organ that produces gametes, such as the ovaries and testes.
- haploid
- When a cell has only one set of chromosomes, typical of a gamete.
- internal fertilization
- Reproduction occurs through the internal deposit of gametes.
- external fertilization
- Reproduction where the eggs are fertilized outside the body.
- meiosis
- Nuclear division that results in haploid gametes.
- ovaries
- Female gonads in animals that produce eggs.
- parthenogenesis
- Reproduction where an unfertilized egg develops into a new individual.
- sexual reproduction
- Reproduction where gametes from two parents combine to make an individual with an unique set of genes.
- sister chromatids
- Two genetically identical chromosome segments that form after DNA replication.
- testes
- Male gonads in animals that produce sperm.
- zygote
- Single cell that is formed after the fertilization of an egg; the first cell of a new organism.