Examlex
Red-green color blindness is caused by a sex-linked recessive allele. A color-blind man marries a woman with normal vision whose father was color-blind. What is the probability that they will have a color-blind daughter?
What is the probability that their first son will be color-blind?
(Note the different wording in the two questions.)
Leks
Social systems or gatherings in some species where males congregate to engage in competitive displays and courtship behavior to attract mates.
Sage Grouse
A species of grouse native to sagebrush ecosystems of western North America, known for their elaborate courtship rituals.
Fiddler Crabs
A type of crab known for their sexually dimorphic claws, where males possess one enlarged claw used for communication and contests during mating rituals.
Oxytocin
Posterior pituitary hormone that acts on smooth muscle of the reproductive tract and breasts.
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