In Manx cats, the recessive allele for tail length is lethal. A heterozygous dominant genotype results in a shortened tail, while a homozygous dominant genotype results in a normal tail. A homozygous recessive genotype is lethal. Which of the following rows correctly identifies the phenotypic ratio of the offspring that results from crossing two shortened tail Manx cats? Select one: a. Normal Short Tail Lethal 2 1 0 b. Normal Short Tail Lethal 0 2 1 c. Normal Short Tail Lethal 2 1 1 d. Normal Short Tail Lethal 1 2 1

Three different genes determine the coat colour of cats. One of the genes controls the black-based coat colour. There are three alleles for black-based coat colour genes with the following order of dominance: black (B) > chocolate (bch) > cinnamon (bc). Two black cats were crossed. The offspring produced were three black kittens and one chocolate kitten. What is the probability of having a male chocolate kitten? Select one: a. 0.50 b. 0.25 c. 0.13 d. 0.06

Feather colour in parakeets is controlled by two genes. Blue colour (B) is dominant over absence of colour (b). Yellow colour (Y) is dominant over absence of colour (y). When a B allele and a Y allele are present, a green parakeet is produced.The probability of obtaining a female or male parakeet is the same as for humans. A green parakeet crossed with a white parakeet produced offspring with four different colour patterns.What is the genotype of the green parakeet?  Answer

A cross is performed between individuals with the following genotypes: Aabb and aaBb. Use a Punnett square and predicted probabilities to answer the following questions. A. What is the probability that an offspring is dominant for the first trait and recessive for the second?  B. What is the probability that an offspring is dominant for both traits?  C. What is the probability that two offspring are dominant for both traits?

Consider 2 loci in Angus cattle: One locus for coat colour G allele = Black is dominant over g allele = Red, and another locus for absence of horn W allele = Polled/Hornless is dominant over w  allele = Horned. Use Punnett Square method to predict the genotype of the offspring of the following crossings: a) What type of crossing would produce the  phenotypic ratio of 1:1:1:1? b) What type of crossing would produce the  phenotypic ratio of 9:3:3:1 ?

What would the genotypes and genotypic ratio be for the F2 generation produced in a phenotype and phenotypic ration of F1 individuals that were produced from a male blue tailed gecko crossed with a female green tailed gecko, being that all 28 of the offspring had green tails, were mated brother and sister?

please answer the following question

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 swallowtail butterflies, let's pretend that the R gene codes for coloring on the forewing. The R1 allele, which codes for red color, is dominant to the R2 allele, which codes for white color. If R1 is a recessive lethal allele, what phenotypic ratio would you expect when crossing two swallowtails with red forewings?  1 red : 2 white  1 red : 3 white  3 red : 1 white  there is not enough information given to answer this question  1 red : 1 white  2 red : 1 white