Biology

Biology, 10.07.2019 13:30, milkshakegrande101

If an f1 plant is backcrossed to one of the pure-breeding parental plants, what is the expected ratio of phenotypes among progeny?

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Biology, 16.07.2019 03:30, karinapenn8259

The order of genes on a plant chromosome is a, b, and d, where a and b have a recombination frequency of 0.2, and b and d have a recombination frequency of 0.3. a pure-breeding plant that has the dominant a and b phenotypes with a recessive d phenotype is crossed to a pure-breeding plant that has the recessive a and b phenotypes with the dominant d phenotype. the resulting hybrid is crossed to a plant that has all three recessive phenotypes. under the assumption that interference in this region is zero, what percentage of each progeny type would result from a single crossover between a and b?

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Biology, 12.09.2019 18:30, MariaIZweird9631

Apea plant from a pure-breeding strain that is tall, has green pods, and has purple flowers that are terminal is crossed to a plant from a pure-breeding strain that is dwarf, has yellow pods, and has white flowers that are axial. the f1 plants are all tall and have purple axial flowers as well as green pods. a. what phenotypes do you expect to see in the f2? b. what phenotypes and ratios would you predict in the progeny from crossing an fl plant to the dwarf parent?

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Biology, 21.09.2019 02:30, MrTeriffic

Exam how do we know if a trait is caused by one gene or by two genes that interact? example: dihybrid cross of pure-breeding parents produces three phenotypes in f2 progeny if single gene with incomplete dominance, then f2 progeny should be in 1: 2: 1 ratio if two independently assorting genes and recessive epistasis, then f2 progeny should be in 9: 3: 4 ratio these ratios can appear very similar. further breeding studies can reveal which hypothesis is correct.

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