Glossary terms beginning with Y

Y chromosome

a sex chromosome. Males have one copy of this chromosome in their genome. Females have no Y chromosome.
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Yellow dung fly

a common fly around dung. The adults are predatory and the larvae feed on dung.
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Yellow fever

a virus transmitted by mosquitoes.
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Yellow jacket

cf. Vespidae - insects in the family Vespidae within the Order Hymenoptera. They are more commonly known as the social wasps.

Young insect

cf. Larva - the juvenile form of an insect.