Final answer:
Yes, two horses with straight hair can produce an offspring with curly hair. The curly hair trait is determined by a recessive gene that could be present in the parents. When both parents pass on the recessive gene, the offspring will have curly hair.
Step-by-step explanation:
Yes, two horses with straight hair can produce an offspring with curly hair. This is because even if the parents have straight hair, they may still carry the recessive gene for curly hair. When two horses with straight hair mate, there is a chance that they both pass on the recessive gene to their offspring, resulting in curly hair.
In this case, the genotype of the straight-haired horses would be SS (homozygous dominant), while the genotype of the curly-haired offspring would be ss (homozygous recessive). The curly-haired trait is only expressed when both alleles are recessive.
Learn more about Heredity and Punnett Squares