Let’s suppose gene A and gene B are closely linked to each other. An AaBb individual (with the dominant alleles in trans) is crossed to an aabb individual. Which type(s) of offspring would you expect to be rare?

Consider the genetic map below. (a) In a total of 1000 observed progeny, how many would be expected to be parental, non-recombinant? (b) If the total number of observed double-crossover recombinant progeny is 0, what is the interference?    A-------20 cm-----B—5cm----C

In dogs, the brown fur allele (B) is dominant to the white fur allele (b), and on a different chromosome, the curly fur allele (Q) is dominant to the straight fur allele (q). Quilty has brown and curly fur (BbQq) and she mates with Razor, who has brown and straight fur (Bbqq). Part 1 Fill in the missing parts of the Punnett square for this cross. Razor's gametes are shown on the left, and Quilty's are shown along the top. Bq BQ BBqq Bbqq Brown, curly + bQ Bbqq BbQq BBQq Bq bq bbQq bbqq Part 2 Fill in the phenotypic ratios of the F1 generation from the cross between Quilty (BbQq) and Razor (Bbqq). White, curly: ♦ Brown, straig ✓ 1 2 3 4 White, straight:

In an attempt to breed winter barley that is resistant to barley mosaic virus, agricultural researchers cross a susceptible domesticated strain with a resistant wild strain. The F1 plants are all susceptible, but when the F1 plants are crossed with each other, some of the F2 individuals are resistant.  Is the resistance allele recessive or dominant?  (Note: susceptible means able to get the viral disease, while resistant means not able to get the disease)   A) The resistance allele must be recessive B) The resistance allele must be dominant