Mixing DNA between humans and animals can potentially lead to various outcomes, depending on the specific circumstances and the organisms involved. However, it is important to note that the creation of hybrids or chimeras (organisms with mixed DNA) between humans and animals is generally considered unethical and is typically prohibited by laws and ethical guidelines in most countries.

That being said, in hypothetical scenarios, if human and animal DNA were mixed, a range of possible consequences might occur:

1. Failed Compatibility: Human and animal DNA are not always compatible due to differences in chromosome number, structure, and genetic regulation. In many cases, the embryos produced would not develop properly or would not survive.

2. Disease Transmission: Mixing DNA between humans and animals could potentially result in the transfer of zoonotic diseases (diseases that can be transmitted between animals and humans) or the creation of novel diseases.

3. Physical Abnormalities: In cases where hybrid or chimeric embryos survive, they could exhibit physical abnormalities or deformities. These abnormalities could affect various aspects of development and physiology, potentially leading to severe health issues or premature deaths.

4. Ethical Concerns: The mixing of human and animal DNA raises significant ethical concerns about the dignity, autonomy, and well-being of both humans and animals. These concerns range from potential exploitation and suffering of animals involved in genetic experimentation to violating the boundaries and uniqueness of human existence.

It is important to note that although research involving mixed DNA has been conducted at a cellular and genetic level to gain scientific understanding, the creation of human-animal chimeras for reproductive purposes or beyond certain restrictive laboratory settings is currently not widely practiced due to ethical considerations.