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Are There are about 8 million different possible combinations of chromosomes for every human cell.?
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Kevin Greenfelder
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How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8?
There are about 8 million possibilities for the gametes.
How does crossing over contribute to genetic diversity?
Crossing over in Prophase I in Meiosis aids genetic diversity because it allows for more unique combinations of chromosomes to be produced. Genetic variability strengthens a population, and influences evolution. 2n= # of possible gamete possibilities. In humans, this number is 46. n= # of chromosomes, which is 23 in a single cell. 2^23= 8 million different gamete possibilities, without any crossing over. A resulting zygote (result of the fertilization of the sperm gamete and egg gamete) would have 2^23 * 2^23 = over 7 trillion possibilities of chromosome combinations. All of this, of course, is without crossing over. The numbers become infinitely high once genetic material is exchanged between two sets of homologous chromosomes during Prophase I.
Do all species have the same number of chromosomes?
No, chromosomes vary from species to species. A species is distinguished by individuals that can mate and have young that are capable of producing offspring. The number of chromosomes two individuals have must be the same for this to be possible.
Why does meiosis show variation in gametes?
In meiosis, one source of genetic variation is crossing-over, which is the exchange of corresponding segments of DNA between non-sister chromatids, in other words chromatids of two different homologous chromosomes. This process recombines segments of maternal and paternal DNA along the molecule. It occurs during prophase I.Another source is independent assortment of chromosomes. This simply means that when two chromosomes separate and go to opposite poles at anaphase I, the separation of one pair of chromosomes has no influence on the separation of another pair. Even without crossing-over, one individual human could, in theory, produce more than eight million genetically different haploid cells through independent assortment. (It's a bit like dealing a hand of cards. There are many different possible combinations.)
Does random fertilization lead to genetic variation?
yes they do. that is because when the sperm fuses with he egg, there are millions af sperm and it is highly highly unlikely that the same sperm containing the same genetic information will fuse with the same egg each time. different sperms have different genetic material in them. same with the eggs. thus their probabilities are way too low that it is impossible that one offspring looks like the other therefore leading to genetic variation. hope that helps
What s random fertilization?
The random combination of chromosomes resulting from pairing up 1 of the 8.4 million possible chromosome combinations of a sperm with 1 of the 8.4 million possibly chromosome combinations of the egg (due to independent assortment of chromosomes during Meiosis. This comes out to about 70 trillion combinations, which does not even factor in the crossing over of genetic material during Meiosis.
How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8?
There are about 8 million possibilities for the gametes.
How many combinations are possible for a six-digit lock?
Assuming each "digit" actually has 10 different states, there are one million combinations possible in a six-digit combination lock. However, many combination lock designs actually have fewer than 10 different states per "digit", resulting in far fewer actual combinations on such locks.
How many combinations are there for a 6 digit number using the numbers 0 to 9?
If you can repeat the numbers within the combination there are 10,000 different combinations. If you cannot repeat the numbers within the combination, there are 5040 different combinations.
How can a child inherit a phenotype which neither of his parents have?
A phenotype is basically just the physical appearance of an individual. Inheritance is merely the transference of characteristics from one generation to another. When the pairs of chromosomes are pulled apart during meiosis, chance alone determines which member of each pair of chromosomes end up in the same cell. The possible combinations for humans (23 pairs of chromosomes) can be calculated to 2 to the 23rd power, or over 8 million different possible combinations in each sperm or ovum. The combinations possible in a zygote (fertilized egg) are greater that 70 000 000 000 000. As a result, its hard to find an exact duplicate for any one human being. When genes are transmitted from one generation to another, particular traits found in both parents can passed onto the child, expressed by dominant genes. A child can look physically different from either parent due to recessive gene traits carried by each parent. Recessive genes are present in the parents but remain "unseen".
How many combinations are in a million Legos?
The combinations are endless!
How is it possible that over 20 million living organisms on the planet are made up of olny 5 types of nucleotide bases arranged in long chains?
Because the bases can be arranged in many different combinations (Apex)
How many different 6 number combinations can be made starting from 1 to 50 You can repeat numbers in the sequence?
506 = 15,625 million
How many possible combinations are there in the first four moves of chess?
There are 400 different positions that can result after the first move (each player making a move). After just two moves, there are some 72,084 positions possible. Over 9 million possibilities appear at the end of three moves, and over 288 billion after four moves. In the fourth move, there are (very) roughly 288 billion minus 9 million, or 287 billion, 991 million possible positions that can result in the fourth move. That's 287,991,000,000 possible positions (approximately) that can be achieved during the fourth move.
What primary colors make white?
it is possible, you can use the color red, blue, and yellow with a certain amount of that color, (there is over 1 million possible combinations to try and figure out how to make white.) after this is done you can possibly end up with white.
How does gene shuffling contribute to gene variety int the gene pool?
Gene Shuffling-one of the two main sources of genetic variation(other is mutations) Gene Shuffling happens at the gametes/sex cells formation when the chromosomes line up in the middle at random during meiosis. So that means the 23 pairs of chromosomes we have can produce 8.4 million different combinations of genes. Think of it as to playing cards. Each card represents an allele/trait. When you shuffle the cards, it leads to many different hands(poker) you can obtain. I hope my horrible explanation helps.
Do all species have the same number of chromosomes?
No, chromosomes vary from species to species. A species is distinguished by individuals that can mate and have young that are capable of producing offspring. The number of chromosomes two individuals have must be the same for this to be possible.
