Question

what is true of a dihybrid cross? check all that apply
check all that apply
two traits are involved.
four alleles will be observed per gamete.
two alleles will be observed per gamete.
offspring will receive four alleles (total) for the observed traits

Explanation:

• A dihybrid cross involves two different traits (each controlled by two alleles, one from each parent for each trait). So "Two traits are involved" is correct.
• For gametes in a dihybrid cross, each gamete gets one allele for each of the two traits, so two alleles per gamete (not four), so "Two alleles will be observed per gamete" is correct.
• Offspring receive two alleles (one from each parent) for each of the two traits, so total four alleles for the two traits, so "Offspring will receive four alleles (total) for the observed traits" is correct. The "Four alleles will be observed per gamete" is incorrect as gametes get one allele per trait, two traits mean two alleles per gamete.

Answer:

• Two traits are involved.
• Two alleles will be observed per gamete.
• Offspring will receive four alleles (total) for the observed traits.