Humans, and other organisms that reproduce through sexual means, obtain approximately half of their dna sequence from the father, and half from the mother. this is a result a. stronger genes from one diploid gamete beating out weaker ones from the other. b. a haploid egg combining with a haploid sperm to form a diploid zygote. c. the alleles from a haploid sperm combining with only the healthiest alleles from a diploid egg. d. the father contributing the x chromosome and the mother contributing the y chromosome.