How is sex determined in egg-laying reptiles? Answer Unselected Genes are activated during embryonic development. Unselected Many have both male and female reproductive organs. Unselected The male gamete determines the sex of the offspring. Unselected Sex changes after maturation; female is the “default” sex. Unselected The female gamete determines the sex of the offspring.
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Select the scenarios that demonstrate environmental sex determination. During embryonic development, an undifferentiated gonad of sex chromosomes occurs. XX embryos obtain an extra copy resulting in a karyotype of 5d49Sy for species of marine worms. These worms have larvae that are released into the ocean. Larvae that land on the ocean develop into females, having a long proboscis and uterus, whereas male larvae develop symbiotically. An XX individual has a copy of the SRY gene attached to chromosome X. The individual develops male characteristics despite the absence of a Y chromosome. The offspring of a mating between a male and female grasshopper is male with XO sex. The 0 represents the lack of a second sex chromosome, and the grasshopper has only one X chromosome. A proportion of offspring of a species of fish in California develop into females when larvae are exposed to longer day photoperiod than expected. Some red-eared slider turtle eggs incubated at unusually warm temperatures above 30°C result in all female offspring in the brood.
Adi S.
Madhur L.
In some reptiles such as crocodiles, the sex of the animal is determined by
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