Question

1: In a plant, the trait for purple leaves (B) is dominant over the trait for green leaves (b). Which cross will result in maximum offspring with the purple leaf trait?
bb x Bb
bb x bb
BB x bb
Bb x Bb

2: In pea plants, the allele for purple flowers (P) is dominant over the allele for white flowers (p). What percentage of the offspring is expected to be purebred from the cross of Pp x Pp?
25%
50%
75%
100%

3: *skip*


4:*skip*


5: *skips*

6: In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?
bb x bb
Bb x Bb
BB x bb
BB x BB

7: *skip*


*Thank you so much*

Answer 1

Answer:

In a plant, the trait for purple leaves (B) is dominant over the trait for green leaves (b). Which cross will result in maximum offspring with the purple leaf trait?

(1) BB X bb

(2) 25%

Explanation:

From the above crossing, it is expedient to know that BB X bb will result into Bb, Bb, Bb and Bb genotype and the result shows dominance of purple leaves (B) over green leaves (b)

(2) after crossing on PP ha purebred