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

Dihybrid Crosses In guinea pigs, black (B) is dominant to brown color (b). Short hair (H) is dominant to long hair (h). Cross a guinea pig that is true breeding black with short hair to a Guinea Pig that is true breeding brown with long hair. Genotypes of parents: Black/short Brown/long Gametes from black/short guinea pig: Gametes from brown/long guinea pig: What will the genotype(s) of the offspring be? What will the phenotype(s) of all the offspring be?

Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results: Phenotypes Number of Offspring Red and round 2 255 Red and oval 290 Yellow and round 310 Yellow and oval 2 145 Convert the expected phenotypic ratio from Part A into the expected probability for each of the four phenotypes and record them in the table below. Calculate the probability for each of the four phenotypes observed in the cross from the data presented at the beginning of the question by dividing the number of progeny in each class by the total number of progeny and record these in the table below. Probability = Number of Progeny in Phenotype Class ÷ Total Progeny  Compare the expected probabilities of each phenotype to…

Homozygous purple flowers have the genotype WW, and W is a dominant allele. A pea plant with unknown genotype and purple flowers is test crossed with a homozygous recessive white-flowered plant (genotype ww), and one-half of the resulting progeny have purple flowers, while the other half have white flowers. What is the genotype of the test-crossed parent?   do not copy from others

Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results: Phenotypes Number of Offspring Red and round 2 255 Red and oval 290 Yellow and round 310 Yellow and oval 2 145   Convert the expected phenotypic ratio from Part A into the expected probability for each of the four phenotypes and record them in the table below. Calculate the probability for each of the four phenotypes observed in the cross from the data presented at the beginning of the question by dividing the number of progeny in each class by the total number of progeny and record these in the table below. Compare the expected probabilities of each phenotype to the observed probabilities. Are the gene for fruit colour and…

Examine the following crosses carried out to explore inheritance of traits in pea plants. Parent cross: rough, soft peas X smooth, hard peas F1 : all rough, hard Test cross: rough, hard X smooth, soft peas F2 : 115 rough soft, 110 smooth hard, 8 rough hard, 12 smooth soft Identify which traits are dominant, and either support or refute the hypothesis that the traits rough/smooth and soft/hard assort independently according to Mendel's law.

You know that hamster unicorns (Phodopus monocerus) will be the next big pet craze and are investigating their genetics. In hamster unicorns, fur color is controlled by two loci (B and P). When you cross true-breeding black hamster unicorns with true-breeding pink hamster unicorns, all F1 offspring are black.  Hamster unicorns that are B_P_ and B_pp are black, bbpp are pink, and bbP_ are baby blue. What type of epistasis is this? *genetics/bio question*

Suppose a student performs a three-point test cross with mice involving mouse genes T, V and D. If the most abundant classes of progeny are TvD and tVd and the rarest classes are tvd and TVD which gene is in the middle and what is the genotype of each mouse involved in the cross?

Please answer the question below

Feather colour in birds is controlled by two genes on separate chromosomes. Blue colour (B) is dominant over the absence of colour (b). Red colour (R) is dominant over the absence of colour (r). When a B allele and an R allele are present, a purple feathered bird is produced. A heterozygous purple bird was crossed with a blue-feathered bird. One white-feathered offspring resulted from the cross. What is the genotype of the blue-feathered bird?    1. Genotypes 2. Punnett Square 3. Explanation