20.1 Sexual Reproduction

If an organism reproduces asexually, its offspring will most likely be:

• produced as a result of fertilization
• Genetically identical to the parent
• Genetically different from each other
• Produced from specialized cells known as gametes

What is an advantage of sexual reproduction?

• Allows genetic variation
• Only needs one parent
• Offspring are exact copies of parent

What is one disadvantage of sexual reproduction?

• Only one parent needed

• Offspring are exact copies of parents

• Happens very quickly

• Needs two parents

What is a gamete?

• sex cell

• human cells

• plant cells

• plant and animal cells

The male gamete is called a

• ovum

• sperm

• zygote

• mitosis

The female gamete is called a

• ovum

• sperm

• zygote

• mitosis

Which type of cell division create identical cells?

• mitosis

• meiosis

• gamete

• fertilization

Genes that are always expressed in the offspring are called

• dominant

• recessive

• zygote

• noninherited

Genes that are NOT always expressed in the offspring are called

• dominant

• recessive

• zygote

• noninherited

A person's chromosomal gender is male if the zygote has which chromosomes?

• XX

• XY

• YY

• XXY