Using the letter b= black hair and b= brown hair. what is the genotypes of the following dogs?
(a) homozygous dominant
(b) heterozygous (c)homozygous recessive

What is the next step in muscle contraction after the actin changes shape? (apex)

Thyroid-stimulating hormone stimulates the thyroid gland to secrete sex hormones. true or false

Males of different species of the fruit fly drosophila that live in the same parts of the hawaiian islands have different elaborate courtship rituals. these rituals involve fighting other males and making stylized movements that attract females. what type of reproductive isolation does this represent?