BIO 203 Lecture Notes - Lecture 21: Vas Deferens, Sexual Differentiation, External Fertilization

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Genes come from one parent without fushion of egg and sperm: usually relies on mitotic . Fission separation of parent into two or more individuals of approximately equal sized: most common form of asexual reproduction. Budding new individuals splitting off from existing ones (offspring. Advantage: increases genetic variability among offspring by generating unique combination of genes. Sexual reproduction presents a special problem for certain organisms. One solution to this problem is hermaphroditism. In which each individual has both male and female reproductive systems may _ Genes come from fushion of haploid cells (gametes) to form a zygote. Sexual reproduction (fertilized egg) which is diploid two types of gametes. Another remarkable reproductive pattern is sequential hermaphroditism: in which an individual reverses its sex during its lifetime (e. g. , Most animals display cycles of reproductive activity: controlled by hormones and environmental cues (often related to seasons)

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