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 …
Why are female gametes larger than male gametes?
The answer relates to the size of cells that will fuse together to produce the next generation (the sex cells or gametes). The individual that produces the relatively smaller gamete is universally called “male” and the individual that produces the relatively larger gamete “female”.
Why is the number of male gametes produced always much more than the number of eggs produced?
Because not all the sperm gets to the egg(s). To ensure each egg will be ferrtilized there needs to be more sperm then egg(s). And sperms are motile and they have to compete with one another for their existence.
Why the number and size of human male gametes differ from the number and size of human female gametes?
Answer: It is an advantage to produce lots of gametes rather than a few. But production is costly, and could result in cutting down the size of individual gametes: males produce a lot of sperm, but each one is very small. In other words, the number of gametes produced is inversely proportional to gamete size.
Why do men have long gamete production?
In a natural setting, male age and mating history are usually confounded: older males have usually mated and replenished their sperm supplies more often, so they have made a greater lifetime reproductive effort.
Why are eggs and sperm different sizes?
In humans, they are several times larger than a typical body cell and about 10,000 times larger than sperm cells. There’s a reason why egg cells, or oocytes, are so big: They need to accumulate enough nutrients to support a growing embryo after fertilization, plus mitochondria to power all of that growth.
How do gametes differ in size and structure?
Gametes are an organism’s reproductive cells, also referred to as sex cells. … Sperm cells or spermatozoon are small and motile due to the flagellum, a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell or ovum is relatively large and non-motile.
Why is the number of sperms produced always much more than the number of eggs produced in humans write two points to explain this?
Answer Expert Verified
Sperms are produced in large numbers because of low survival chance. They are quite sensitive to environmental factors such as pH and heat. … Therefore to increase the chances of a sperm reaching the ovum in the Fallopian tube to fertilize it, they must be produced and released in large numbers.
Why is number of male gametes?
Video Solution: A: The number of male gametes produced is several times than the number of female gametes produced R: This compensates the loss of male gametes during movement. R: This compensates the loss of male gametes during movement.
Why male gametes are produced in large numbers in organisms exhibit external Fertilisation?
Why do gametes produced in large numbers in organisms exhibit external fertilization? Answer: … (ii) Producing large number of gametes increase the chance for at least some eggs and sperms to meet in the environment ensuring that atleast a stable number of off spring are able to survive and carry on.