In a certain cattle,hair color can be red (homozygous dominant), white (homozygous recessive) or ..?
95947
A) Both the genotype and phenotype would be roan\nB) 1/2 you would get roan(Rw)and 1/2 white(ww)
490930
black or white or any other color in dominate/recesive genes. Its a gamble really.
420093
Yes.  The woman is heterozygous for colorblindness (mutant from mom, normal from dad).  Since colorblindness is sex-linked recessive (i.e. carried on the x-chromosome, so males only have one copy and females have two), the son inherited the mutant allele from his mother, and non from his father.  The daughter inherited the normal allele for color vision from her mom and the mutant from her dad.  Since colorblindness is recessive, she has normal color vision.\n\nThe woman is also a carrier for hemophilia (mutant from dad, normal from mom).  The daughter would be normal no matter what unless her dad has hemophilia because she gets a normal allele from him.  She could be a carrier or could be homozygous dominant.  The son inherited the normal allele from his mom, and nothing from his dad.\n\nBy the way, contrary to the previous answer, both colorblindness and hemophilia are sex-linked _recessive_ traits.  And expression of a given allele does not "skip a generation," no matter what; it is always the result of the combination of alleles, not whether the gene was expressed in the previous generation.\n\n__________\nThat's interesting, because my textbook from AP bio states, "color-blindness is a mild disorder inherited as a sex-linked trait," but maybe you know something that the professors who wrote my textbook do not?  There's also the minor detail that both my AP bio teacher last year and my genetics professor this year used colorblindess as an example of a sex-linked trait.  And for what it's worth, Wikipedia states, "the genes for the red and green color receptors are located on the X chromosome."\n\nAutosomal traits are, by definition, not sex-influenced, as autosomal means carried on any chromosome other than the sex choromosomes.
940033
Let's take the Blue eyes - brown eyes example.  Brown is the dominant trait, so we'll use the capital B letter.  Blue is the recessive trait, so we'll use the b letter.  A person with blue eyes has the genotype bb (got a b from dad and a b from mom).  A person with brown eyes can be homozygous BB (got B from dad and B from mom) or heterozygous Bb (got B from one parent and b from the other parent).\nA first generation usually starts with pure breeds, so both homozygous.  We'll have BB and bb as the starting parents.  Those parents produce gametes in their gonads.  Let's say that mom has blue eyes and dad has brown eyes.  All her eggs will have the b gene as all dad's spermatozoids will have the B gene.  If you want to make the Punnett square, you'll find that all babies will have 100% probability to be Bb\n____|__B__|__B__\n__b_|_Bb__|_Bb__\n__b_|_Bb__|_Bb__\nThe second generation is made by taking two of those offspring and crossing them.  First, you have to find out what alleles will be in the gametes.  Half of the eggs will be b and half will be B.  Also, half of the spermatozoids will be B and half will be b.  In the Punnett square you'll have.\n____|__B__|__b__\n__B_|_BB_|_Bb_\n__b_|_Bb__|_bb__\nHere, the babies will have 25% chance to have blue eyes (bb) and 75% chance to have brown eyes (25% homozygotous BB and 50% heterozygotous Bb).
707484
A)\n\nThe white mouse shares the phenotype and genotype of parents\n\nMother white mouse: aa\nFather white mouse: aa\nWhite mouse: aa\n\nThe Brown mouse might be 2 things, \neither heterozygous: Aa\nor homozygous dominant: AA\n\n(in these type of exercises, when you mate something with an animal from which you have no info, he's usually homozygous. And if he wasn't the next step would not work.)\n\nTherefore, the mating of the white mouse (aa) with the brown mouse (AA) give only heterozygous (Aa) brown mice.\n\nWhy not B?\nBecause if the white mouse was heterozygous (Bb), that meant that "White" was the dominant gene, and the brown mouse had to be homozygous recessive (bb). But now you can say that they still could have a brown mice offspring, because they both carry a recessive allele (bb). Well, yes, but eventually white mice would appear in the be born (BB, Bb). This way it would never be all brown.\n\nWhy not C?\nBecause all the offspring would then be all white and never brown. It's the inverse of example A).\n\nWhy not D?\nBecause the white mouse is alive and fertile.
958482
The dominate gene, or trait is stronger than the recessive.\n\nSay your dad has brown eyes. Your mon has green.  (brown is the dominate gene)  You would have more brown in your eyes cause the brown gene is dominate (stronger)\n\nWill
813775
Monohybrid inheritance is the inheritance of a single characteristic. The different forms of the characteristic are usually controlled by different alleles of the same gene. For example, a monohybrid cross between two pure-breeding plants (homozygous for their respective traits), one with yellow seeds and one with green seeds, would be expected to produce an F1 (first) generation with only yellow seeds because the allele for yellow seeds is dominant to that of green.\n\nSource:\nhttp://en.wikipedia.org/wiki/Monohybrid
230652
color of skin\ngender
819103
i stand corrected (looked up answer). its rare but possible.  \n\nEye color is an inherited trait influenced by more than one gene.[6][7] There seem to be three genotypic eye colors (brown, green, and blue) in humans.[3] Although it was once thought that brown eye color was always dominant and blue eye color was always recessive, the fact that two blue-eyed parents can give birth to a brown-eyed child has shown that the determination of eye color does not follow the simple rules of Mendelian inheritance.[6][8] Three gene pairs coding for human eye color are currently known: EYCL1, EYCL2, and EYCL3.[9][10]\n\nhttp://en.wikipedia.org/wiki/Eye_color#Determination_of_eye_color\nhttp://www.biosci.ohio-state.edu/~pfuerst/courses/eeobmg640/reading1eyecolor.pdf
633663
the portion of genes that determines traits are called alleles (sp).  If you want to find out which ones I am sure they are mapped out if you use a search engine\n\nAt one time scientists thought that a single gene pair, in a dominant/recessive inheritance pattern, controlled human eye color. The allele for brown eyes was considered dominant over the allele for blue eyes. The genetic basis for eye color is actually far more complex. At the present, three gene pairs controlling human eye color are known. Two of the gene pairs occur on chromosome pair 15 and one occurs on chromosome pair 19. The bey 2 gene, on chromosome 15, has a brown and a blue allele. A second gene, located on chromosome 19 (the gey gene) has a blue and a green allele. A third gene, bey 1, located on chromosome 15, is a central brown eye color gene. \n\nsaved you the trouble
515090
dominant e.g. Aa, AA - Recessive -aa
508663
well it depends... it's a simple genetics case really... but it depends if your husband is Homozygous or Heterozygous dominant. If he is homozygous, this means he has two dominant alleles for brown hair... and your child will never have read hair, becuase his genes will be dominant over your red hair and recessive gene. However, if he is heterozygous with one dominant brown hair gene and the other a recessive gene, then there is a 50% chance of his recessive gene combining with your recessive gene. But it is only possibel to guess at what his genes are unless you go back to previous family generations, this is called genetic counselling, where people study your history to determine what genes you have.
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.
512854
genetics is the study of heredity and variation. most traits are inherited from the parents; sometimes it's the same as the father's, sometimes it's the same as the mother's, other times it's a combination of both and in some cases, the traits inherited can not be seen in any of the parents. \n\nlet's try to find out the probabilities or chances of inheriting the eye color trait... i think brown eye color is a dominant trait (B), and green eye color is probably recessive (b) so:\n\nif the father (or male/m) is heterozygous dominant for the trait (Bb) and the mother (or female/f) is most probably homozygous recessive (bb) then...\nm&#92;f b b\nB Bb Bb\nb bb bb\n-----------\n2 Bb : 2 bb\nor 50% chance of brown eyes and 50% chance of green eyes\n\nbut if the father (or male/m) is homoozygous dominant for the trait (BB) and the mother (or female/f) is most probably homozygous recessive (bb) then...\nm&#92;f b b\nB Bb Bb\nB Bb Bb\n------------\n4 Bb\nor 100% chance of brown eyes
251437
I typed albino deer into Google search.\n\nAlbino: Among the questions most often asked are "What causes some deer to be albinos?" "How common are they?" "Are they protected?" and "Can they reproduce?" Albinism is a recessive trait found in mammals, birds, reptiles, fish and even plants. These plants and animals do not have the gene for normal coloration and do not produce the enzyme responsible for skin, hair and tissue coloration. Albinism is the total absence of body pigment. The eyes of an albino are pink, because blood vessels behind the lenses show through the unpigmented irises. As you might guess, albinism is not a desirable trait for either predators or prey species. Being totally white year-round makes concealment difficult. Also, many albinos have poor eyesight. In the game of life, where survival of the fittest is the rule, albinos have a strike against them from the start. Perhaps that is why albinos are rare.Because albinism is a recessive trait, both parents must carry the gene before it can occur in their offspring. An albino deer bred to another albino would have only albinos. An albino bred to a normal deer with no recessive genes for albinism would produce all normally pigmented deer. Offspring from this cross would carry the recessive gene for albinism but would be normally colored. When carriers of albinism breed there is a one-in-four chance they will produce an albino fawn. Recessive genetic traits typically become less common unless they confer a survival advantage or are artificially enhanced through selective breeding. Based on hunter reports, about one deer in 30,000 is an albino. Not all white deer are true albinos. Some white whitetails have normally pigmented noses, eyes and hooves. This is a genetic mutation for hair color but not other pigments.
759462
Homozygous recessive?
612642
brown is dominant, green and blue are recessive, therefore both parents have two copies of the gene for their eye color therefore they don't have a brown gene to pass on.