Sexual Reproduction Flashcards
What is sexual reproduction?
Sexual reproduction involves the joining together of male and female gametes (sex cells).
In sexual reproduction there are _____ parents. The parents have sex ____. The sex organs make sex cells or _____.
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Organs
Gametes
In male animals sex cells are called ______. The sperm are made in the sex organs called _____.
In female animals the sex cells are called ______. The eggs are made in sex organs called ______.
Sperm
Testes
Eggs
Ovaries
During sexual reproduction the ____ and ___ join together. This is called _____. A fertilized egg or _____ is produced. The fertilized egg divides many times to form a ball of cells called an _____.
Egg Sperm Fertilization Zygote Embryo
The sperm contain genes of the ____. The eggs contain genes from the _____. The fertilization egg has a mixture of genes from both parents. So sexual reproduction brings about greater ____ in offspring.
Father
Mother
Variation
Which show more variation, asexual or sexual?
Sexual
Can fertilization take place outside the body in water?
Yes this is called external fertilization
What is internal fertilization?
Sperm and egg join together in the body of the female.
What is fertilization?
It happens when the nucleus of the sperm joins up with the nucleus of the egg.
What is a sperm?
Specialized cell that can swim and is designed to carry genetic information from the male parents to the egg of the female parent. The genes from the father are carried in the nucleus of the egg.
What is an egg?
Bigger than sperm. It contains yolk as a food store. It also has a nucleus. The genes from the mother are carried in the nucleus of the egg.
How are eggs and sperm different?(4)
Size, movement,food store,how many produced
Also the sperm cells has many _____ to provide energy. The ______ is a part of the sperm’s head. It releases _______ to digest a way through the ____ membrane.
Mitochondria
Acrosome
Enzymes
Egg
