Question

1.5.2 test (cst): computer - scored unit test. a plant can have either broad leaves (b) or narrow leaves (b). a plant with genotype bb is crossed with a plant with genotype bb. which punnett square correctly represents this cross? o a. b bb bb b bb bb o b. b b b bb bb b bb bb o c. b b b bb bb b bb bb o d. b b bb bb b bb bb

Explanation:

Step1: Identify alleles for each parent

The parent with genotype $BB$ can only pass on the $B$ allele. The parent with genotype $Bb$ can pass on either $B$ or $b$ alleles.

Step2: Set up Punnett - square

In a Punnett - square, we put the alleles of one parent on the top and the alleles of the other parent on the side. The top row has alleles from the $Bb$ parent ($B$ and $b$), and the left - hand column has alleles from the $BB$ parent ($B$).
When we combine the alleles:

• When the $B$ from the $BB$ parent combines with the $B$ from the $Bb$ parent, we get $BB$.
• When the $B$ from the $BB$ parent combines with the $b$ from the $Bb$ parent, we get $Bb$.

The resulting genotypes in the Punnett - square are $BB$ and $Bb$.

Answer:

C.

	B	b
B	BB	Bb