0
How does the alternation of meiosis and fertilization in the life cycles of sexually reproducing organisms maintain the normal chromosome count for each species?
Wiki User
∙ 13y ago
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number.
n=chromosome number
Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies)
Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
The table below shows the number of chromosome pairs for various organisms. Which organism can produce the highest number of genetically different gametes?
Carp, Giraffe
What are examples of organisms reproducing sexually?
Us. All the animals you can see.
What is an important factor in increasing variety among sexually reproducing organisms?
Because male and female cross the age of 18 they are reproducing are sex
What are two main sources for genetic variation in a population?
Mutation and the genetic recombination in sexually reproducing organisms.
What is a form of asexual reproduction in which offsprings are produced?
All asexually reproducing organisms are potentially capable of reproducing, and they don't waste any energy in trying to attract a mate
How does the alternation of Meiosis and fertilization in the life cycle of sexually reproducing organisms maintain normal chromosome count for each species?
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number. n=chromosome number Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies) Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
If meiosis did not occur in sexually reproducing organisms?
If meiosis did not occur in sexually reproducing organisms, the chromosome number would double in each generation. Sexual reproduction results in new combinations of genetic traits.
How does the significance of meiosis maintained the chromosome number?
No. Meiosis results in halving of chromosome number. Chromosome number after one round of meiosis is half that of original chromosome number. Generally, meiosis takes place during gamete formation. So when two gametes fuse, they lead to restoration of the chromosome number. Hence chromosome number can be maintained in sexually reproducing organisms.
Why is it particularly difficult for the systematist to classify asexually reproducing organisms as a species?
Asexually reproducing organisms do not interbreed
How do variation occur in asexually reproducing organisms?
mutation of the DNA is the only way asexually reproducing organisms can obtain variations in their population
How does water aid the fertilization of some organisms?
Depending on the species, fertilization can occur internally or externally. Water aids the fertilization of some organisms because organisms that reproduce externally need water for fertilization to occur.
What is the significance of alternation of generation?
alternation of generation is very important in plants because it results into the formation of a variety of new organisms... it is also important because it provides such organisms which have more chances of survival...
What is the significance of alternation of generations?
alternation of generation is very important in plants because it results into the formation of a variety of new organisms... it is also important because it provides such organisms which have more chances of survival...
Triploid organisms have copies of each chromosome?
Triploid organisms have ___two___ Copies of each chromosome?
What do some organisms die without?
Reproducing.
Why are chromosome always an even number in organisms?
No, some bacteria and other unicellular organisms have a single chromosome
Where do sexually reproducing organisms inherit their alleles from?
From their parents.
