Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
Andalusian fowls have two pure forms - black and white. If black forms (BB) and white forms (bb) are crossed,individuals appear blue coloured (Bb), due to incomplete dominance. Which of the following would be an outcome of a cross between black form and blue form?
Options:
Answer:
Solution:
As Mendel, on crossing homozygous members for contrasting characters, the dominant trait is expressed in the heterozygous or hybrid condition. Incomplete dominance is a deviation of Mendels law of dominance where the heterozygous individual instead of expressing the dominant trait, it expresses a trait which is a mix of the parent traits. On crossing, black form fowl with white form fowl, the offspring is blue form.
When a black form fowl is crossed with blue form fowl we get-
| B | B | |
| B | BB | BB |
| b | Bb | Bb |
Genotype of- BB and
Phenotype of- Black and Blue
