Understanding Probability of Trait Combination in Genetics

When analyzing the probability of a trait combination, such as black fur and red eyes, it is crucial to examine each trait independently before considering them together. This process involves utilizing Punnett squares to visualize the possible offspring genotypes and their associated probabilities.

Probability of Black Fur:

For black fur, the probability can be determined based on the genotypes of the parent organisms. In an example scenario where one parent is homozygous dominant (BB) for black fur and the other parent is heterozygous (Bb), the Punnett square analysis reveals a 100% probability of offspring having black fur.

Probability of Red Eyes:

Similarly, the probability of red eyes can be calculated by examining the genotypes of the parents. If one parent is heterozygous (Rr) for red eyes and the other parent is homozygous recessive (rr), the Punnett square predicts a 50% chance of the offspring having red eyes.

By considering each trait separately using Punnett squares, we can calculate the individual probabilities of black fur and red eyes. These probabilities can then be multiplied together to determine the likelihood of a trait combination, such as black fur and red eyes, occurring in the offspring.