Question

sexual reproduction results in genetic variation in part because the offsprings dna is a blend of their parents dna. during sexual reproduction, an egg cell from one parent and a sperm cell from the other parent combine to create a zygote that will develop into a new organism. egg and sperm cells, or gametes, are haploid, so they only have half as many chromosomes as diploid somatic cells. human gametes have 23 chromosomes. so when a sperm cell fertilizes an egg cell, the resulting zygote contains 23 pairs of homologous chromosomes, or 46 total chromosomes. select the true statements. sexually reproducing organisms get all of their chromosomes from one parent. human zygotes contain 46 total chromosomes. gametes contain half as many chromosomes as somatic cells do. during sexual reproduction, two diploid cells combine to form a haploid cell

Explanation:

• For the statement "Sexually reproducing organisms get all of their chromosomes from one parent": This is false. As per the text, sexual reproduction involves an egg (from one parent) and a sperm (from the other parent) combining. So chromosomes come from two parents.
• For the statement "Human zygotes contain 46 total chromosomes": The text clearly states "when a sperm cell fertilizes an egg cell, the resulting zygote contains 23 pairs of homologous chromosomes, or 46 total chromosomes". So this is true.
• For the statement "Gametes contain half as many chromosomes as somatic cells do": The text says "Egg and sperm cells, or gametes, are haploid, so they only have half as many chromosomes as diploid somatic cells". So this is true.
• For the statement "During sexual reproduction, two diploid cells combine to form a haploid cell": This is false. Gametes (egg and sperm) are haploid. When they combine (fertilization), a diploid zygote is formed (23 + 23=46 chromosomes in humans).

Answer:

• "Human zygotes contain 46 total chromosomes" is a true statement.
• "Gametes contain half as many chromosomes as somatic cells do" is a true statement.