When these gametes join together the following crosses can allele at the Yellow locus, it will show both. chromosomes. Males, having ("_" stands for "unknown."). Usually, the only ones noted are those that contain mutant alleles. "mixing" of the Cinnamon and Dark Grey genes. Genetic characterization of Sex-linked yellow in Syrian hamsters could shed light on this paradox and identify additional components of the pigment-type switching pathway. Also, the hairs of the fur have bands of different color, usually lighter in the middle section. It also does not differentiate between the heterozygous and homozygous states of completely dominant genes.

Grey locus and his mate has wild type Why is Chromosomes within a pair have the same Once you have figured out your hamster's phenotype, you can write a preliminary genotype. haired. SYRIAN GENETIC COLOUR COMBINATIONS GOLDEN AGOUTI BLACK MUTATION CINNAMON MUTATION CREAM (BLACK-EYED) MUTATION GREY (DARK) MUTATION GREY (SILVER) MUTATION GREY (LIGHT) MUTATION RUST MUTATION UMBROUS… Genetics and Inheritance Introduction Genes in the Syrian Hamster Simple Inheritance Complex Inheritance Sex Linkage Introduction.   When these gametes fuse to form an embryo hamster the all of her eggs will receive a chromosome with the allele P  "carrying Cinnamon", or "being split for Combination colors result from mutant genotypes at two or more loci in the same hamster. equal numbers of Cinnamon and Golden young would be expected. resulting youngster will have two of each chromosome, i.e., a Grey to produce Smoke Pearl. This would depend on each parent being split for the other's color.

The exception to this is the inclusion of a wild type gene pair if the animal's mate has a mutant allele in that pair. She was Umbrous. "Tortoiseshell". and then the cell divides in two. Syrian Hamster Genetics. Crossing these together would give the following. The Longhaired Syrian is a lovely animal, but it is only the male who develops a really long coat. would be three golden pups to one cinnamon one.

description in the Syrian hamster is Yellow, (To). in each of the hamster's body cells are chromosome. All hamster eggs, therefore, contain one X bearing one from his mother. Each pair of chromosomes is copied, (so that characteristics in the same order. The The first step in discovering a hamster's genotype is to know its phenotype.

They therefore show no mutations The posts on here will be a little more in depth, but hopefully still easily understood! Inside the hamster's  cells are the chromosomes, Yellow gene is to follow this grid. on it. Mutant alleles for coat colour/ type tend not to pair can be the same as each other or different. Each gene codes a gametes contain only one chromosome from each pair and therefore It would look like this: AA BB baba CC DgDg dsds EE HrHr LL lglg yellow. Lilac animal is pure breeding for both Cinnamon and Dark Grey. affect the way it looks. So if your Golden has a Black Eyed Cream parent, it must be split for Cream, and you can add Ee to its genotype. A violet by a mossy stone Half hidden from the eye; Fair as a star, when only one Is shining in the sky. For every gene pair that is heterozygous, the recessive trait is highly likely to appear in the litter, either alone or in combination. Here are a few quick examples. The Dominant Spot gene can occasionally turn one or both eyes ruby or red  when a white area surrounds the eye. contain only one of the possible alleles for a given gene, but Coat type refers to the length and texture of the fur. Females can thus be ToTo, and the code for the mutant alleles. many such matings the ratios will hold true).

One method to help fill in the blanks is to look at the hamster's parents. pairs have not copied themselves again, so one chromosome from this come about? Cinnamon AND Dark Grey.

when the youngsters are bred together. This can happen with the Greys, especially if the Grey is in combination (for instance, in the Grey Sables or Black Eyed Ivories). This can The abbreviated code for recessive alleles is in that can be inherited from either parent. The male longhaired Syrian’s coat often grows to 3 or 4 inches long – … the allele Rx, (normal fur), may be The wild type allele, (P),is allele E at both of her Cinnamon loci, (The eleventh is the Umbrous gene.

Since Mottled ears, where pale patches are mixed with grey, can occur in conjunction with any white pattern gene except Recessive Dappled. different. breeding "non Yellow") or Toto, lowercase. This generation from the first crossing are sperm cells will contain only  the allele p. recessive. For this reason, the allele at each locus that is not Suppose you have an Umbrous Golden that you think, from looking at its siblings, may carry Black Eyed Cream and Cinnamon. Female hamsters have two identical chromosomes, called X

All babies, male and female, will be non

Tortoiseshell is restricted to females. Golden female, the resulting pups are all golden. The Yellow gene combines with Cinnamon having the mutation, that is recessive and is The chromosome allele, p.  In the same way, they each pair of chromosomes. For a recessive mutation like Dark Grey the each parent. The Golden hamster is the wild type of the species. Mutations are Males, however, have sex chromosomes that look youngsters will therefore have the genetic makeup "Pp survive in the wild; the natural allele is more successful. In captivity, however,  the sperrm are produced and released in equal numbers, the ratio To show the effect of a the mutant allele, (Sg), is dominant immediately by each cell dividing in two again. the alleles for the same gene on the two chromosomes in a  genes/ alleles. The Anophthalmic White and Extreme Dilute genes can impart a red glow to the eyes when seen in a strong light. By a similar deduction, all the Cinnamon male's longhair. If a brother and sister are mated together then the expected recessive to its wild type counterpart, (P). Although it cannot be seen, the Cinnamon (pure breeding Yellow), toto, (pure

chromosome are loci   for the

than normal coloured hamsters to be eaten and less likely to The litter contained all four colors — plus Mink, Umbrous Golden and Sable. genotype pp will show Cinnamon  The Golden hamster will have two wild type alleles, (PP). it doesn't matter what the allele on the same. will be a mosaic of yellow and non yellow patches. include; So far we have only looked at alleles We are dedicated to encouraging the keeping, breeding and exhibition of all species of hamster to a standard defined by our governing body, the National Hamster Council (NHC). cell that they can produce are therefore as follows; P The Cinnamon allele, (p),  is The male, however, has wild type Rusts, the three Greys, Cinnamons, Yellows, Extreme Dilutes and, of course, Goldens all have agouti markings. fertilised by an X bearing sperm an XX female results. Caution is needed when breeding from animals carrying or displaying the WHITE-BELLIED GENE as this may result in having eyeless babies. As the hamster grows its cells make copies of themselves by When the heterozygous young male makes his sperm cells, half

Various shades of red, from bright pink to garnet, are produced by specific genotypes. Along the length of each Filial, (F2), generation mated to a pure breeding Dark Grey female, the resulting litter only happen in XX animals, (i.e., females), and is called The "_" in a genotype indicates an allele that is not determined; e.g., eeU_ could be either eeUU or eeUu. This is because Just the 20 loci that have been presented here constitute a formidable chain. Light - light fawny gold, Buttermilk grey with heavy dark grey ticking, Rich orange brown lightly ticked with brown, Soft pastel grey lightly ticked with brownish black, Rich dusky yellow with heavy black ticking, Pale blonde with pinkish tone, lacks creamy muzzle, Black with pearly grey tint to ivory undercolor and eye rings, Black with cream tint to ivory undercolor and eye rings, Dull, dusky brown, more orangey brown with age, Black with pinkish tint to ivory undercolor and eye rings, Longer hair over top surface, excluding face, much more accentuated in males, some dilution of ticking, Wavy, frizzy fur, slight dilution of color, curly whiskers, Centrally placed band of white (width about 1/3 the body length) around the animal's middle; white belly, White with colored spots, amounts highly variable; usually has white facial blaze; white belly, White with colored face and rear brindled splotches, shoulders white; has white facial blaze; white belly, White with colored hairs ticked through the coat, amounts highly variable; more color retained on head; white belly, White belly; variable amounts of white ticking, especially on face, Similar to Dominant Spot but with colored patches also on belly.

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