Question

pp x pp
possible gametes:
p and p
(label side)
possible gametes:
p and p (label top)
the punnett square above represents...

• the crossing of 2 recessive individuals
• the crossing of 2 heterozygous individuals
• the crossing of 2 homozygous individual
• the crossing of homozygous individual with a heterozygous individual

Explanation:

1. First, recall the definitions:

• A recessive individual has a genotype with two recessive alleles (e.g., \( pp \)).
• A heterozygous individual has two different alleles (e.g., \( Pp \)).
• A homozygous individual has two identical alleles (either \( PP \) or \( pp \)).

1. The Punnett square is for \( Pp \times Pp \). Both parents have the genotype \( Pp \), which means they are heterozygous (since they have one dominant \( P \) and one recessive \( p \) allele).
2. Now, analyze each option:

• "the crossing of 2 recessive individuals" would be \( pp \times pp \), not \( Pp \times Pp \), so this is incorrect.
• "the crossing of 2 heterozygous individuals" matches \( Pp \times Pp \), as both parents are heterozygous.
• "the crossing of 2 homozygous individual" would be either \( PP \times PP \) or \( pp \times pp \), not \( Pp \times Pp \), so this is incorrect.
• "the crossing of homozygous individual with a heterozygous individual" would be, for example, \( PP \times Pp \) or \( pp \times Pp \), not \( Pp \times Pp \), so this is incorrect.

Answer:

the crossing of 2 heterozygous individuals