You have pure breeding lines of lizards.  One pure breeding line has very long tails and the other pure breeding line has very short tails.  When you cross lizards from the two lines you get an F1 generation where all the lizards have intermediate length tails.  When you cross F1 individuals to one another you get an F2 generation where there is a wide range of tail lengths with intermediate lengths are the most common.  Your result is consistent with which of the following modes of inheritance

mouse lemurs are small mammals that inhabit the forests of madagascar. Researchers discovered an unusual spotted fur coloration pattern in mouse lemers in a remote region in the Tsaratanana. Reserserve in northern Madagaskar. A spotted female mpouse lemer was crossed with a solid male mouse lemer. The F1 progeny consisted of 50% solid female mouse lerners and 50% spotted male mouse lemer. What is the most likely mode of inheritance for the fur coloration pattern in mouse lemers? somatic inheritance autosomal inheritance x-linked inherintance Y-linked inheritance

Two genes are found in a chameleon, one for camouflage (dull colors dominant to vibrant colors) and another for muscle strength (strong dominant to weak), which seem to follow basic Mendelian inheritance patterns, To determine if they are linked, you set up a testcross and got the following results: Phenotype Number of Progeny Dull colors; Strong 98 Dull colors; Weak 76 Vibrant colors; Strong 72 Vibrant colors; Weak 105 Did you start this experiment with the genes in coupling or repulsion? O Coupling O Repulsion O Cannot determine with this information

If the hybrid parents were mated 100 times, it does not mean that this is the exact distribution of genotypes in those 100 offspring. The likelihood of each genotype being passed on is the same for each offspring. There is just a higher likelihood that offspring with be hybrid when hybrid parents are crossed. Complete the following examples: Brown hair (H) in horses dominates over white hair (h). Cross a pure brown sire with a hybrid brown dam. What are the possible genotypes and phenotypes and their likelihood of appearance? Dam Genotype Sire % chance in offspring Phenotype % chance in offspring

In the rat, the pattern of coat color is affected by a gene with two alleles. PH is the allele for hooded, in which the animal is mostly white with color restricted to the shoulders and neck. P+ is the normal solid body color allele. These two alleles exhibit incomplete dominance, so that heterozygotes have white bellies only. A true-breeding solid strain is crossed with a true-breeding hooded strain, to produce an F₁ generation that is all white belly. The F₁ generation rats are mated with each other to produce 800 F₂ offspring. Below is a table that gives the observed number of each phenotype in the F2 and also gives you the expected number. Question: If you perform a Chi-square goodness of fit test, what is the value of Chi square X² (Express your answer to the hundredths.) solid white belly hooded Σ Observed 195 420 185 800 Expected 200 400 200 800

Pigeons display a high color variety, here we try to understand the genetic basis of mixed red & black stippling of the feathers (kitey) and their genetic relation to black and red feather color. We conducted the following crosses: Cross Offspring kitey x kitey 16 kitey 5 black 3 red kitey x black 6 kitey 7 black red x kitey 18 red 9 kitey 6 black   Have a look at the cross results and develop a hypothesis to explain the inheritance of kitey, black and red feather color in pigeons (Hint: assume that 2 loci are involved and some type of epistasis occurs) QUESTION: 1. provide hypothesis                     2.  provide the hypothetical genotypes for each crossing

A scientist is investigating the inheritance of two autosomal recessive genes in rat, ear length (long is dominant to short) and fur color (gray is dominant to white). The table below provides the number of observed off-spring for each phenotype, when heterozygous rats are crossed.  What are the expected values for each phenotype? Phenotype Observed Expected Long, gray 189   Long, white 56   Short, gray 74   Short, white 23   Total 342

In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b.  Short hair (H) is dominant to long hair (h).  In a cross between a homozygous black, longhaired rabbit and a brown, homozygous shorthaired one, what would the F1 generation look like?  If you did not know the genotype of an F1 rabbit, you could determine its genotype by a test cross in which it is crossed with an animal with which phenotype AND genotype If you carried out this test cross, what phenotypes and in what ratio would you expect? What phenotypes in what ratio would be expected in the F2 generation?