12696076
Description
Flashcards by sumaya mohamed, updated more than 1 year ago
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Created by sumaya mohamed
over 6 years ago
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| Question | Answer |
| What are genetics? |
Genetics is the study of inherited characteristics called traits.
Image:
Dna (binary/octet-stream)
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| what are alleles? | Different forms of the same gene located at the same point of the homologous chromosomes. |
| What do alleles do? | They occupy the same position on homologous chromosomes. |
| What is pure breeding? | Where all individuals have the same genetic information for a characteristics generation after generation. |
| Example of pure breedings | The cross between a pure breeding red flowered pea plant and a pure breeding white-flowered pea plant produces only red-flowered plant. |
| What is the dominant trait? | The trait that is observed in the outward appearance of a heterozygous individual. |
| What is the recessive trait? | The trait that is remained hidden in the heterozygous condition and seen only in the homologous. |
| Example | The red flower is dominant trait the white is the recessive trait |
| When representing alleles, how is the dominant trait represented and how is the recessive trait represented? | It is represented by an upper-case letter related to the name, in this case, the red flower could be represented by the letter R.The recessive characteristics is then represented by the lower case of the same letter. |
| What are homozygous? | Having two identical alleles on homologous chromosomes. |
| Example | RR or rr |
| What are heterozygous? | Having two different alleles on homologous chromosomes. |
| Example | Rr |
| what is genotype? | genetic information carried by an individual. |
| what is a phenotype? | observable characteristics of the individual; the way the genotype is expressed. |
| How is sex of a person determined? | Male=XY Female=XX |
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