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Animal Reproduction

Across
The stage where haploid eggs and sperm are being produced prior to fertilization.
A term for either a zygote enclosed by a shell, or the female haploid gamete.
Transfer and receive chromosomes.
The condition or time period of an animal with an unborn offspring.
An unborn placental organism/animal.
The female reproductive organ that produces the haploid gamete called ova.
Give birth to live young.
Fluid containing sperm of male fish.
The union of an ovum and a sperm outside an animal's body.
The structure with blood vessels connecting an embryo to its mother.
Stored food that an unhatched chick uses to grow.
Half the number of chromosomes.
External fertilization carried on by fish.
The normal end of pregnancy.
The moniker or nick-name given to the eggs of sharks and rays.
The fluid-filled sac around an embryo.
The structures that produce milk for a newborn.
Down
Type of animals that need to use surroundings to heat their eggs.
Are tiny, but still allow for gas exchange.
The union of an ovum and a sperm inside a female parent.
A special female organ where the embryo develops.
The stage or process of cells growing into adults.
The time period an embryo spends inside the womb.
The structure/organ attached to uterus wall providing food and oxygen for embryo.
Study marine life from algae to whales.
Contains two sets of chromosomes.
Inside the amnion providing protection for the embryo.
The egg white; contains protein, water, and some vitamins and minerals.
Male reproductive organ that produces the haploid gamete sperm.
The diploid stage where mitosis can then occur.
The haploid gamete produced by males.