Question

1. were earnest and denise the parents of tonja or had the hospital made a mistake? explain your reasoning.

why do the twins look so different?
now, danielle wants to know how her twins could look so different, with michelle having dark skin and michael jr. having light skin. first, danielle needs to understand that there are two types of twins. identical twins come from the same zygote when a developing embryo splits in two, so identical twins have exactly the same genes.
michelle and michael jr. are fraternal twins, the result of two separate eggs, each fertilized by a different sperm. to understand how one of the twins could have light skin and the other dark skin, we will consider two alleles of one of the genes for skin color.

genotype	phenotype (skin color)
bb	light brown
bb	tan

Explanation:

For the question "Why do the twins look so different?"

The twins are fraternal (from two separate eggs fertilized by different sperm). Fraternal twins inherit different combinations of genes. The table shows skin - color genotypes (BB, Bb, bb) with corresponding phenotypes (dark brown, light brown, tan). Since they have different gene combinations for skin color (different genotypes), their phenotypes (skin color appearance) differ, causing them to look different.

To determine this, we would analyze genetic traits (e.g., skin - color genes as in the twin scenario) of Tonja and the alleged parents (Earnest, Denise). If Tonja's genotype for a trait (like skin color) is inconsistent with what the parents' genotypes can produce, it may indicate a hospital mistake. But without specific genetic data for them, a conclusive answer isn't possible from the given text.

Answer:

The twins are fraternal (result of two separate eggs, each fertilized by a different sperm). They inherit different gene combinations (genotypes) for skin color. As seen in the genotype - phenotype table, different genotypes (e.g., BB for dark brown, Bb for light brown, bb for tan) lead to different skin - color phenotypes, so their appearances (including skin color) differ.

For the question "Were Earnest and Denise the parents of Tonja or had the hospital made a mistake? Explain your reasoning."

(Note: Since there is no data about Earnest, Denise, and Tonja's genetic information or other relevant details in the provided text, we can't give a detailed explanation. But generally, to determine parentage, we would compare the genetic traits (like skin - color genes as in the twin example) of the child (Tonja) with the alleged parents (Earnest and Denise). If the child's genotype for a trait (like skin color) is not possible given the parents' genotypes, it could suggest a hospital mistake. For example, if parents have genotypes that can only produce certain skin - color genotypes and Tonja's genotype is outside that range, a mistake may have occurred. Without specific genetic data for Earnest, Denise, and Tonja, we can't conclude definitively here.)