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Inheritance and Evolution
19
chromosome: a thread of DNA, made up of a string of genes
gene: a length of DNA that is the unit of heredity and codes for a specific protein
inheritance: the transmission of genetic information from generation to generation
haploid nucleus: a nucleus containing a single set of unpaired chromosomes
diploid nucleus: a nucleus containing two sets of chromosomes
growth: a permanent increase in size and dry mass by an increase in cell number or cell size or both
development: an increase in complexity
mitosis: nuclear division in which the chromosome number is maintained by the exact duplication of chromosomes
meiosis: reduction division in which the chromosome number is halved from diploid to haploid
allele: any of the two or more alternative forms of a gene
homozygous: having two identical alleles of a particular gene
heterozygous: having two different alleles of a particular gene
genotype: genetic makeup of an organism in terms of the alleles present
phenotype: the physical or other features of an organism due to both its genotype and its environment
dominant: an allele that is expressed if it is present
recessive: an allele that is only expressed when there is no dominant allele of the gene present
mutation: a change in a gene or chromosome
natural selection: the greater chance of passing on genes by the best-adapted organisms
genetic engineering: taking a gene from one species and putting it into another species
Inheritance and Evolution
Across:2. | having two different alleles of a particular gene | 3. | a length of DNA that is the unit of heredity and codes for a specific protein | 5. | a nucleus containing a single set of unpaired chromosomes | 6. | an increase in complexity | 10. | a permanent increase in size and dry mass by an increase in cell number or cell size or both |
| 14. | a change in a gene or chromosome | 16. | genetic makeup of an organism in terms of the alleles present | 17. | an allele that is expressed if it is present | 18. | any of the two or more alternative forms of a gene | 19. | taking a gene from one species and putting it into another species |
| | Down:1. | the physical or other features of an organism due to both its genotype and its environment | 4. | a thread of DNA, made up of a string of genes | 7. | reduction division in which the chromosome number is halved from diploid to haploid | 8. | the greater chance of passing on genes by the best-adapted organisms | 9. | having two identical alleles of a particular gene |
| 11. | a nucleus containing two sets of chromosomes | 12. | the transmission of genetic information from generation to generation | 13. | nuclear division in which the chromosome number is maintained by the exact duplication of chromosomes | 15. | an allele that is only expressed when there is no dominant allele of the gene present |
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© 2012
PuzzleFast.com, Noncommercial Use Only
Inheritance and Evolution
Across:2. | having two different alleles of a particular gene | 3. | a length of DNA that is the unit of heredity and codes for a specific protein | 5. | a nucleus containing a single set of unpaired chromosomes | 6. | an increase in complexity | 10. | a permanent increase in size and dry mass by an increase in cell number or cell size or both |
| 14. | a change in a gene or chromosome | 16. | genetic makeup of an organism in terms of the alleles present | 17. | an allele that is expressed if it is present | 18. | any of the two or more alternative forms of a gene | 19. | taking a gene from one species and putting it into another species |
| | Down:1. | the physical or other features of an organism due to both its genotype and its environment | 4. | a thread of DNA, made up of a string of genes | 7. | reduction division in which the chromosome number is halved from diploid to haploid | 8. | the greater chance of passing on genes by the best-adapted organisms | 9. | having two identical alleles of a particular gene |
| 11. | a nucleus containing two sets of chromosomes | 12. | the transmission of genetic information from generation to generation | 13. | nuclear division in which the chromosome number is maintained by the exact duplication of chromosomes | 15. | an allele that is only expressed when there is no dominant allele of the gene present |
| |
© 2012
PuzzleFast.com, Noncommercial Use Only