The branch of animal science under which genetic characteristics and its inheritance are studied is called [D] Genetics. Genetics is a specialized field of biology that focuses on the study of genes, heredity, and genetic variation in organisms. In animal science, genetics involves examining the genetic makeup of animals, understanding how traits are inherited from parents to offspring, and investigating the mechanisms underlying genetic inheritance.

Geneticists analyze DNA sequences, gene expression patterns, and genetic markers to identify genes responsible for specific traits and to study their inheritance patterns. By studying genetics, researchers can gain insights into the genetic basis of traits, diseases, and behaviors in animals, as well as the evolutionary processes shaping genetic diversity within populations. Genetics plays a crucial role in animal breeding, conservation biology, and biotechnology, contributing to advancements in agriculture, medicine, and wildlife management.