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| Question | Answer |
| The male sperm cell can carry either of these chromosomes | X or Y |
| The female egg cell can only carry this chromosome | X |
| A historical sequence of life indicated by fossils found in the many layers of the Earth | fossil record |
| The number of chromosomes in a human body cell | 46 |
| The sex chromosome combination or genotype that will result in a girl | XX |
| How an organism changes over time is known as | evolution |
| Type of reproduction in which two parent cells must join together to form a new individual | sexual reproduction |
| The egg and the sperm combine during this proces | fertilization |
| When breeders cross genetically different organisms in hopes of producing offspring with the best traits of each organism. Ex. Liger, Yorki-po | hybridization |
| A group of organisms that are able to mate and produce fertile offspring | species |
| How sex cells are made | meiosis |
| A remnant or trace of an organisms that was once alive is known as a | fossil |
| The new cell that is formed after the egg and sperm combine is called a | zygote |
| Organelle where DNA is found inside of a eukaryotic cell | nucleus |
| When scientists remove a bit of genetic material from one organism and insert it into another | genetic engineering |
| Type of reproduction in which only one parent cell is needed to make an offspring | asexual reproduction |
| A characteristic that helps an organism survive in its environment and reproduc | adaptation |
| The sex chromosome combination or genotype that will result in a boy | XY |
| The number of chromosomes in a human sex cell | 23 |
| When scientists take genetic info from an organism and make an exact copy of that organism. Ex. Dolly the sheep | cloning |