the gametes of a plant of genotype SsYy should have what genotype?
476198
25% - SY\n25% - Sy\n25% - sy\n25% - sY
791081
Punnett squares are really important in genetics. They allow for determining possible genotypes and phenotypes if the genotype of parents is known you can predict the possible genotype of offspring. \nFor example if you cross a homozygous dominant tall plant (TT) with a homozygous recessive short plant (tt) you would have all heterozygous tall plants:\n\n                   T          T\n           t       Tt         Tt\n           t       Tt         Tt\n\nIf you crossed two heterozygous plants for tall (Tt) you would have 1/4 homozygous tall, 1/2 heterozygous, 1/4 homozygous short.\n\n                   T             t\n         T        TT          Tt\n         t          Tt           Tt\n\nHope that helps.
1045988
Cross Fertilization refers to the crossing of species... for example, if you take "male" gametes from a green pea plant and mix them with "female" gametes of a yellow pea plant, you will find the progeny is a mixture of both species... you get green and yellow peas.
185103
it sounds as though the pea plants she has had in other years had the recessive white gene and the dominant purple one. hence, they were purple. this year, however, when the plants were "crossed", the luck of the draw determined that the dominant gene was not passed along, and so in the absence of a dominant gene to make the flowers purple, they are white.
118957
THe indepedent assortment is where each chromosome will be inherited independently of another one during cell division(mitosis). that is, the gametes may contain the any conbination of the parental allels. \nthus the offsprings will not be just like one of the parents, instead, they will be different, inherited what the inherit.
2224
Gametogenesis is the process by which gametes (spermatocytes and ova) are produced in our body
696673
well certain genes on the chromosomes will be transfered to different ones which means the gamits produced in meiosis will have different genes than the parent and it will be a mixed half not a normal half
1032481
Haploid cell have only 1 set of Chromosomes(n) Some organisms, when they reproduce asexually, create other organisms, whose cell are haploid. But when they reproduce sexually, the resulting organism is diploid, meaning that it has two sets of chromosomes (2n), once from each parent.\n\nOvum is the female egg (gamete), before fertilization. An ovum is haploid. The zygote is an ovum that has been fertilized with a sperm. The zygote is diploid.\n\nA gene is a sequence in the DNA that codes for something in particular. Chromosome is the continuous strand of DNA, including genes and non-coding sequences.
725772
A homozygote's cells are diploid or polyploid and have the same alleles at a locus (position) on homologous chromosomes. When an organism is referred to as being homozygous for a specific gene, it means that it carries two identical copies of that gene for a given trait on the two corresponding chromosomes (e.g., the genotype is AA or aa). Such a cell or such an organism is called a homozygote.\n\nA homozygous dominant genotype occurs when a particular locus has two copies of the dominant allele (e.g., AA). A homozygous recessive genotype occurs when a particular locus has two copies of the recessive allele (e.g., aa). This can occur when both parents carry at least one copy of the allele.\n\nPut simply: Homozygous is just having two of the same alleles.
367063
The sperm and egg (1n) come from the gametophyte through mitosis. After fertilization, the zygote grows into a sporophyte (2n). The sporophyte creates spores (1n) by meiosis which grows into a gametophyte (1n). It's a cycle! Hope this helps!
841409
Not sure what you are asking here.\nIf you want your ginkgos to reproduce, you're going to need a female tree... and if there aren't any male ginkgoes nearby, you'll need to plant one of those too (the male and female bits are separate -- they don't grow on the same tree!)\n\nAre you sure you want your ginkgoes to reproduce?  Ginkgo fruit is really messy -- it falls off the tree and goes splat, and rotten ginkgo fruit doesn't smell good!
875129
Parthenogenesis - do a little homework
1075136
Assuming your species is diploid, it goes like this:\n\nSupposing there is a field of red, pink and white flowers. Red flowers have genotype RR, pink Rr or rR, and white rr. \n\nYou count the number of each kind of flower. It turns out there are 150 red-flowered plants, 480 pink, and 170 white ones. \n\nTherefore there are 2*(150+480+170) = 1600 alleles out there. There are 300 Rs in the red plants, 480 in the pink ones and 0 in the white. Added together there are 780. 780/1600 = 0.4875, so the frequency of the R allele is 48.75%\n\nAs for the r allele, there are 0 in the red-flowered plants, 480 in the pink, and 340 in the white. Added together, there are 820. 820/1600 is 51.25%.\n\nAs a double check, 48.75% + 51.25% = 100%
860073
D is the answer.  One cell differentiates and the other cell remains pleuripotent (has the ability to differentiate into many other types of cells).\nHere is why the other choices are incorrect.  Sometimes the other cell will die.  This happens in certain types of ground tissue, but only after the cell has differentiated into a specialized type of cell, which is why A is not the answer.  B is not the answer because gamete in plants is only formed by mitosis.  Only the gametophyte produces gametes and gametophytes are haploid so they only need to undergo mitosis to produce a gamete.  C is not the answer becuase the formation of a zygote requires the fusion of two cells, which does not happen under hte conditions of this question.
295116
http://images.search.yahoo.com/search/images?p=meiosis&fr=FP-tab-img-t&toggle=1&cop=&ei=UTF-8
18875
Both are required. Variation in the population provides something for natural selection to act on. Mutation is one way to generate variation. Recombination  during meiosis is another. This sounds like a trick question. The correct answer is not one or the other--you would have to explain variation. One part of the process generates choices, the other part of the process "chooses" among the available options.
728695
It's called genotype by environment interaction and it's one of the most important principles of genetics.  You really can't say what genetics are "best" without considering the environment and vice versa.  So in short, neither is better, they work together.