How can you determine the potential litter size of a female rat?
611580
well if she has had a litter before you can use how many she had.you can go with how many sibling she had when she was boen and the fathers siblings if this is the first,but if you dont know any of this info its safe to say that she will have 6 to 8 pups.
880790
>>Wild rats: At normal conditions generally are at an average of 500 grams (1 lb) in weight but seldom weigh over 500 grams (1 lb) in the wild.\n\n>>For pet rats (fancy rats): Bucks (male rats) reach an average weight of between 400g and 800g, while does (female rats) can average between 250g and 450g.♥
906936
Assuming that the rough coat is dominant, and the smooth coat is recessive, the offspring must all have 1 r in their genotypes.  The smooth coated guinea pigs have the rr genotype, and the rough coated guinea pigs have the heterozygous genotype, Rr.  Heterozygotes express the rough phenotype.  The Punnett square would look as follows:\n\n\nFATHER              MOTHER:   r               r\n\nR                                           Rr             Rr\n\n\nr                                            rr                rr\n\n\nThe father's genotype must be Rr (and his phenotype must be rough coat).
242899
knowing her spots and especially her G spot
1008328
an egg, but im not sure how big
972008
This is obviously a statistics problem.  Treat each mother as a sample and the data entry the age at which they had their first child.  If all you need is the "mean" point, it is a simple matter of knowing what a "normal distribution" is.  Half of the mothers will be above the mean date and half below (both 50%).  In a "formula" it would be (total of all the ages divided by the number of mothers)  More useful for the analyst is the shape of the distribution - the bell curve and the amount of data in the "tails".  To do this you need to perform a "t test" of the data set.  Since I assume that what you mean is the whole population of women, the distribution can be assumed to be "normal" and the "degrees of freedom" is infinite.  Look up "t test" in your statistics book, also known as "student's t".  The answer is there, in the "degrees of freedom" expressed in "standard deviations" from the mean.  Thus you can talk about "confidence intervals" from this.  The Wikipedia article is surprisingly hopeless for the non-mathematician.  My education is statistics came from "Biostatistical Analysis" by Zar, still in print and one of the only books from my former life I still keep on my shelf.
31085
The following link has info about habitat, size, pics, etc.\n\nhttp://www.discoverlife.org/nh/tx/Vertebrata/Mammalia/Dipodidae/Zapus/hudsonius/
333047
You should be able to find what you are looking for here;\n\nhttp://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=RNWE,RNWE:2006-03,RNWE:en&q=false+positive+pregnancy+test+result
961305
OK, cross-sectional data...\n\nMeasuring the width of an obese lady's belly, and comparing it as a ratio of the girth of her thigh.
500355
At three weeks, you won't really see a whole lot of growth visable to the naked eye.  Depending on various factors, like how well you feed him, the condition of his tank water, heat, UVA/UVB lighting, etc, it could take anywhere from 5 to 15 years for him to reach his adult size.  I would say if a few months have gone by, and you're taking care of him properly, if you're still concerned about his growth rate, take him to a reputable herp vet.  Otherwise, I wouldn't worry too much.  Just like human children, some grow slower than others, and some get to be larger than others.  Remember, also, that if you do have a male, he's not going to grow as large as a female would.
121837
First of all, congratulations!\nI don't think you can actually determine the sex of the child without a sonogram or whatever. \nGood luck
86677
Okay, hopefully my quick math is correct....\n\nApril 1st we have 47 rats\nJune 1st we have 900 rats\n\nGrowth model N=No e^k*t  could be re written as:\n\nln(N/No)=k*t\n\nln = natural logarithm\nN = End result of rats\nNo = Beginning amount of rats\nk = growth constant\nt = time\n\nSo, our equation we have \n\nln(900/47) = k*61   (61 is the days from April 1 - June 1)\n\nWhich gives us a growth model of\n\nN=No e^(0.04839*t)\n\nAlrighty...From April 1 - Dec 1 it's approx 240 days\n\nPlugin the numbers  x=amount of rats on Dec 1\n\nln(x/47)=0.04839*240 = 5,197,808.236\n\nWe get approx. 5,197,808 rats on Dec 1st  (alot of rats)\n\nNow you ask when will there be 10000 rats...we plug in our numbers....    t=how many days it'll take\n\nln(10000/47)=0.04839*t = 110.7706 days\n\nSo, approx 111 days from April 1st to reach 10000 rats
1100805
How tiny are you looking for? babys r' us might have them
1165890
go to google.com and type in "Is it a boy or a girl" theres one with in the first 5 links that is a chinese chart you put in your age and it tells you what your having. It worked fo me and for my friend. Hope this helps
898795
I don't really know because I haven’t had smaller than 6" long and maybe 3" around.  But have you ever thought that maybe it’s' not you, its her.  She might be really loose.
494958
The reproductive age and period of maternal care in mice is try doing your own homework.
1107475
http://www.palaeos.com/Vertebrates/Units/240Squamata/240.000.html