na cross of AABbCCddEe x AaBbCcDdEe, assume that capital letters are dominant. What proportion of the offspring will show the dominant phenotype for A, B, and C and the recessive phenotype for D and E? O 3/32 O 9164 O 9/32 O 3/64 O 3/8
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- Assuming complete dominance, crosses between two dihybrid F1 pea plant, which are offspring from a cross AABBaabb, result in F2 phenotype ratios of ________. a. 1:2:1 b. 3:1 c. 1:1:1:1 d. 9:3:3:1A dihybrid cross AaBb X AaBb is made in which B is dominant and b is recessive, but there is no dominance between A and a. Assuming independent assortment, how many genotypic classes are expected in the offspring? a. 2 b. 3 c. 6 d. 9 e. 16In a trihybrid cross involving three traits where the parents are AaBbCc. (a) What is the probability of them producing an offspring recessive for all three traits? (b) What is the probability of offspring with phenotype A_bbc_?
- In cattle, coat color is inherited in a co-dominant fashion. Homozygous C R C R produces red coat,homozygous C W C W produces white coat, and the heterozygous C R C W produces roan-colored coat.What is the probability of having a roan-coated offspring in a cross between a white-coated cattle anda roan-coated cattle?A number of all-white cats are crossed, and they produce the following types of progeny: 1216 all-white, 316 black, and 116 gray. What is the genotype of the black progeny? a. Aa b. Aa Bb c. A_B_ d. A_bIn poultry, the genotype–phenotype relationships forcomb shape are R/– P/–, walnut; R/– p/p, rose, r/r P/–, pea;and r/r p/p, single. What will be the comb characters ofthe offspring of the following crosses? a. A walnut crossed with a single b. A rose crossed with a walnut c. A rose crossed with a pea d. A walnut crossed with a walnut
- A heterozygous individual is crossed with a homozygous recessive individual. a. Draw a Punnett square to represent this cross. b. What is the probability that an offspring will have a homozygous genotype? c. What is the probability that an offspring will have a dominant phenotype? d. What is the probability that three offspring will be produced that all carry the recessive allele but do not express the recessive phenotype?In the cross TtPpAa x ttPpaa, what fraction of offspring are predicted to be homozygous recessive for at least two of the three traits?A certain plant species has dominant red flower color (R) to the recessive white flower color (r). A pure breeding (homozygous) red-flowering plant is crossed with a pure breeding white-flowering plant. What are the possible outcomes for the F1 generation? (Show the Punnett square
- ddTtBbqqAA X ddttBbQqaa Based on the cross provided what is the probability of producing an individual that is dominant for B & A and recessive for D, T and Q?Two guinea pigs are crossed. The father is hetereozygousblack and the mother is homozygous recessive white. What are the chances of getting a white baby guinea pig? Provide the phenotype ratio.In dogs, black (B) is dominant over brown (b) color. What would be the color of the puppies if a purebred black dog is crossed with a purebred brown dog? What would be the phenotypic ratio of the F1 offspring? Show a punnet square for this cross