HEREDITY
MONOHYBRID CROSS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
B
|
|
|
b
|
|
|
Bb
|
Detailed explanation-1: -With eye color, for instance, “B” stands for a brown allele and “b” stands for a blue allele. An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB.
Detailed explanation-2: -Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes.
Detailed explanation-3: -Dominant alleles are seen as an uppercase of a letter; for example, B. Recessive alleles are seen as a lower case of a letter; b.
Detailed explanation-4: -The allele for brown eyes (B) is dominant, while the allele for blue eyes (b) is recessive. A man with genotype bb and a woman with genotype BB have four children.
Detailed explanation-5: -In humans, the allele for brown eyes (B) is dominant. The allele for blue eyes (b) is recessive. If a woman with genotype BB and a man with a genotype Bb have four children.