Sexual and Asexual Reproduction Flashcards
To study (47 cards)
What is fertilization?
When a sperm fuses with an egg to form a zygote and then an embryo.
How many chromosomes do humans have?
46 chromosomes (23 from the father and 23 from the mother).
What is pollination?
The transfer of pollen from the anther to the stigma of a plant.
Sperm and egg cells are both…
Haploid.
Zygotes divide by…
Mitosis.
What are gametes?
Genetically unique sex cells.
Meiosis produces…
Gametes.
Meiosis produces gametes through the processes of…
Crossing over and independent assortment.
What is the benefit of producing offspring sexually?
It increases the chances of survival in certain situations.
How does producing offspring sexually increase the chances of survival?
Parent cells create new babies with new genes, which in certain situations will have adaptations that help them survive.
Sexual reproduction requires organisms to find…
Mates.
Sexual reproduction requires more (1) and usually reproduces (2) offspring than asexual reproduction.
- Time and Effort
- Fewer
What is self pollination?
When the pollen of a plant goes to the same stigma so it creates a genetical offspring when it fertilizes the egg.
What is cross pollination?
When the pollen of a plant goes to the stigma of a different plant so it creates a unique offspring when it fertilizes the egg.
What is the male part of the flower?
The stamen.
What parts are included in the stamen?
Anther and Filament.
Embryos break apart to form the first…
Leaves.
What is pollen?
The fine spores that contain male gametes and that are transported by an anther in a flowering plant.
What is the pollen tube?
A slender tube that grows from a pollen grain, penetrates the ovule, and releases male gametes.
What is the petal?
The brightly-colored part of a flower that functions in attracting insects to the flower to try to contribute to pollination.
What is the sepal?
The floral leaf or individual segment of the calyx, which protects the bud while it is maturing.
What is the receptacle?
The flat concave or convex part of the stem from which all parts of the flower arise.
What is the pedicel?
A small stalk bearing a single flower of an inflorescence (flower cluster).
What are the ovules?
The structures in the ovary containing the egg cells, which develop into seeds after fertilization.