Do males produce more gametes than females?
Females generally produce a few but large gametes, whereas males produce large numbers of much smaller gametes. … Consequently, the limited number of gametes and the greater parental investment of the females result in an asymmetry in the degree of sexual selection between the two sexes.
What process produces more gametes?
Gametes are formed through meiosis (reduction division), in which a germ cell undergoes two fissions, resulting in the production of four gametes.
What produces more gametes internal or external?
In external fertilization the sperm and the egg unite outside the parents’ bodies, but internal fertilization they unite inside the mother’s body. … Animals that use external fertilization usually produce many more gametes than those that use internal fertilization.
Who produce the male gametes?
The testes are the site of gamete production in males. The male gamete is called sperm. It is produced in the seminiferous tubules and testosterone is produced in the interstitial cells.
Why do females produce fewer gametes than males?
Although asymmetry in gamete size rather than number is usually used as the defining characteristic, size dimorphism has the almost inevitable consequence that females pro- duce fewer gametes than males due to a simple physical trade-off – larger things can be produced in smaller numbers, given a limited amount of …
Are gametes produced by mitosis or meiosis?
Gametes are produced by mitosis (not meiosis) and after fertilization a diploid zygote is created. The single zygote cell never grows or divides my mitosis. It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.
Does meiosis produce gametes?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. … Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
Where are gametes produced?
Gametogenesis. Gametes (germ cells) are produced in the gonads. In females, this is called oogenesis and, in males, spermatogenesis.
Why does external fertilization produce more gametes?
Because the male directly deposits sperm into the female’s body, fewer gametes are needed. External fertilization requires the male and female animals to produce larger numbers of gametes.
How many gametes are produced in internal fertilisation?
Differentiate between internal fertilization and external fertilization.
|EXTERNAL FERTILIZATION||INTERNAL FERTILIZATION|
|Usually, a large number of gametes are released in the surrounding medium (for example water).||Male gametes are released inside the body of the female by a copulatory organ.|
Why does external fertilization produce more eggs?
External fertilization in an aquatic environment protects the eggs from drying out. … Therefore, millions of eggs must be produced by individuals. The offspring produced through this method must mature rapidly. The survival rate of eggs produced through broadcast spawning is low.