Question

What would the Punnett square for Ff x ff look like?

Answer 1

The Punnett square for a cross between Ff and ff genotypes comprises one heterozygous allele combination (Ff) and one homozygous recessive allele combination (ff) from each parent, resulting in a 50% probability for each of the two possible genotypes (Ff and ff) for the offspring.

Step-by-step explanation:

Punnett Square for Ff x ff Cross

To visualize the genetic outcomes of a cross between an individual with a heterozygous genotype (Ff) and an individual with a homozygous recessive genotype (ff), we can construct a Punnett square. This is a graphical representation of the types of gametes each parent can produce and the possible genotypes of their offspring.

1. First, we determine the gametes each parent can produce. The Ff individual can produce gametes with either the F allele or the f allele, while the ff individual can only produce gametes with the f allele.
2. Next, we create a grid. We place the gametes from the Ff individual (F and f) across the top of the Punnett square, and the gametes from the ff individual (both f) along the left side.
3. We then fill in the interior squares by combining the alleles from each parent. This will give us the offspring's possible genotypes.

The resulting Punnett square will have two rows and two columns with the following genotypes:

• Ff
• ff
• Ff
• ff

A Punnett square is a tool used in genetics to predict the possible outcomes of a mating between two individuals. In this case, the Punnett square for the cross between Ff (heterozygous) and ff (homozygous recessive) would look like:

Ff | ff

F | FFf | Fff

f | fFf | fff

Thus, there is a 50% chance that an offspring will have the Ff genotype (heterozygous) and a 50% chance of having the ff genotype (homozygous recessive). There are no offspring with the FF genotype (homozygous dominant) in this cross.