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7th Genetics Test #1
Genetics
| Question | Answer |
|---|---|
| A gene that has one recessive and one dominant allele | heterozygous |
| A gene that has two recessive alleles | homozygous recessive |
| A gene that has two dominant alleles | homozygous dominant |
| Genotype or phenotype: Gg? | genotype |
| Genotype of phenotype: brown hair | phenotype |
| Chromosome are made up of ____________. | genes |
| Genes are made up of ________________. | alleles |
| About how many years did Gregor Mendel experiment with pea plants? | ten |
| 3 plants have purple flower and 1 plant has white flowers. What percentage of plants have white flowers? | 25% |
| If a plant has the allele combination Tt, will it be tall or short? Capital T is the dominant trait. | Tall |
| an organism's physical appearance | phenotype |
| a chart that shows four possible combinations of alleles that can result from a genetic cross | Punnett square |
| the likelihood that a particular event will occur | probability |
| an organism's genetic makeup or allele combination | genotype |
| an organism that has two different alleles for a trait | heterozygous |
| an organism that has two of the same alleles for a trait | homozygous |
| Gregor Mendel did most of his genetic testing on | pea plants |
| another word for physical characteristics | traits |
| different forms of a gene | alleles |
| A dominant allele is represented by a _____________ letter | capital |
| A recessive allele is represented by a _______________ letter | lower |
| passing traits from parents to offpsring | genetics |
| organism resulting from sexual or asexual reproduction, such as a human child or new baby plant | offspring |
| characteristics of an organism, such as freckles, curly hair, and height | trait |
| changes in genetic information are called | mutations |
| creates reproductive cells such as sperm and eggs | meiosis |
| creates regular body cells | mitosis |
| Which process creates copies of cells that have half the number of chromosomes? | meiosis |
| Which process create exact copies of cells? | mitosis |
| Are all mutations bad? | no |