In terms of genetic crosses, what do offspring inherit?

• A. Only dominant traits
• B. A combination of traits from both parents
• C. Only recessive traits
• D. No traits at all

Answer: (B)

Offspring inherit a combination of traits from both parents due to the processes of sexual reproduction and genetic mixing. During fertilization, the gametes (sperm and egg) combine, each contributing one allele for each gene, resulting in a unique genetic makeup for the offspring. This blending of genetic information means that traits expressed in the offspring can be dominant or recessive, depending on the alleles inherited from each parent.

The combination of traits ensures genetic diversity, which is crucial for the adaptation and evolution of species. Each parent contributes half of their genetic makeup, meaning that the offspring will have variations of traits that may express differently based on the dominance relationship between alleles. Thus, this option accurately reflects the foundational principles of Mendelian genetics, demonstrating that both parents' genetic contributions are essential in determining the traits of the offspring.