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Genetics
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Chromosomes: Each cell contains 46 of these, arranged as 23 pairs
Genes: a segment of DNA that contains the instructions for making proteins
Allele : alternative forms of a gene for each variation of a trait of an organism
Crossing over : exchange of genetic material between non-sister chromatids from homologous chromosome during prophase I of meiosis; results in new allele combinations
Diploid : cell with two of each kind of chromosome; is said to contain a diploid, or 2n, number of chromosomes
Dominant: observed trait of an organism that mask the recessive form of a trait
Egg: haploid female sex cell produced by meiosis
Fertilization : fusion of male and female gametes
Gamete:male and female sex cells, sperm and eggs
Genetic recombination : major source of genetic variation among organisms caused by re-assortment or crossing over during meiosis
Genetics : branch of biology that studies heredity
Genotype : combination of genes in an organism
Haploid :cell with one of each kind of chromosome; is said to contain a haploid or n, number of chromosomes.
Heredity : passing on of characteristics from parents to offspring
Heterozygous: when there are two different alleles for a trait
Homologous chromosome : paired chromosomes with genes fro the same traits arranged in the same order.
Homozygous: when there are two identical alleles for a trait
Hybrid : offspring formed by parents having different forms of a specific trait.
Law of independent assortment : Mendelian principal stating that genes for different traits are inherited independently of each other.
Law of segregation: Mendelian principal explaining that because each plant has two different alleles, it can produce two different types of gametes. During fertilization, male and female gametes randomly pair to produce four combinations of alleles
Meiosis : type of cell division where one body cell produces for gametes, each containing half the number of chromosomes in a parent’s body.
Nondisjunction : failure of homologous chromosomes to separate properly during meiosis; results in gametes with too many or too few chromosomes
Phenotype: outward appearance of an organism, regardless of its genes.
Pollination : transfer of male pollen grains to the pistil of a flower
Recessive : trait of an organism that can be masked by the dominant form of a trait
Sexual reproduction :pattern of reproduction that involves the production of subsequent fusion of haploid cells.
Sperm: haploid male sex cells produced by meiosis
Trait : characteristic that is inherited; can be either dominant or recessive
Zygote:diploid cell formed when a sperm fertilizes an egg.
Genetics
Across:4. | diploid cell formed when a sperm fertilizes an egg. | 5. | alternative forms of a gene for each variation of a trait of an organism | 7. | haploid male sex cells produced by meiosis | 9. | characteristic that is inherited; can be either dominant or recessive | 10. | type of cell division where one body cell produces for gametes, each containing half the number of chromosomes in a parent’s body. | 11. | fusion of male and female gametes | 13. | cell with one of each kind of chromosome; is said to contain a haploid or n, number of chromosomes. | 14. | offspring formed by parents having different forms of a specific trait. | 16. | outward appearance of an organism, regardless of its genes. | 18. | exchange of genetic material between non-sister chromatids from homologous chromosome during prophase I of meiosis; results in new allele combinations | 21. | Each cell contains 46 of these, arranged as 23 pairs | 22. | transfer of male pollen grains to the pistil of a flower | 25. | failure of homologous chromosomes to separate properly during meiosis; results in gametes with too many or too few chromosomes | 26. | trait of an organism that can be masked by the dominant form of a trait | 27. | when there are two different alleles for a trait |
| | Down:1. | when there are two identical alleles for a trait | 2. | Mendelian principal explaining that because each plant has two different alleles, it can produce two different types of gametes. During fertilization, male and female gametes randomly pair to produce four combinations of alleles | 3. | pattern of reproduction that involves the production of subsequent fusion of haploid cells. | 6. | branch of biology that studies heredity | 8. | paired chromosomes with genes fro the same traits arranged in the same order. | 12. | male and female sex cells, sperm and eggs | 15. | cell with two of each kind of chromosome; is said to contain a diploid, or 2n, number of chromosomes | 17. | haploid female sex cell produced by meiosis | 19. | a segment of DNA that contains the instructions for making proteins | 20. | observed trait of an organism that mask the recessive form of a trait | 23. | passing on of characteristics from parents to offspring | 24. | combination of genes in an organism |
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© 2015
PuzzleFast.com, Noncommercial Use Only
Genetics
Across:4. | diploid cell formed when a sperm fertilizes an egg. | 5. | alternative forms of a gene for each variation of a trait of an organism | 7. | haploid male sex cells produced by meiosis | 9. | characteristic that is inherited; can be either dominant or recessive | 10. | type of cell division where one body cell produces for gametes, each containing half the number of chromosomes in a parent’s body. | 11. | fusion of male and female gametes | 13. | cell with one of each kind of chromosome; is said to contain a haploid or n, number of chromosomes. | 14. | offspring formed by parents having different forms of a specific trait. | 16. | outward appearance of an organism, regardless of its genes. | 18. | exchange of genetic material between non-sister chromatids from homologous chromosome during prophase I of meiosis; results in new allele combinations | 21. | Each cell contains 46 of these, arranged as 23 pairs | 22. | transfer of male pollen grains to the pistil of a flower | 25. | failure of homologous chromosomes to separate properly during meiosis; results in gametes with too many or too few chromosomes | 26. | trait of an organism that can be masked by the dominant form of a trait | 27. | when there are two different alleles for a trait |
| | Down:1. | when there are two identical alleles for a trait | 2. | Mendelian principal explaining that because each plant has two different alleles, it can produce two different types of gametes. During fertilization, male and female gametes randomly pair to produce four combinations of alleles | 3. | pattern of reproduction that involves the production of subsequent fusion of haploid cells. | 6. | branch of biology that studies heredity | 8. | paired chromosomes with genes fro the same traits arranged in the same order. | 12. | male and female sex cells, sperm and eggs | 15. | cell with two of each kind of chromosome; is said to contain a diploid, or 2n, number of chromosomes | 17. | haploid female sex cell produced by meiosis | 19. | a segment of DNA that contains the instructions for making proteins | 20. | observed trait of an organism that mask the recessive form of a trait | 23. | passing on of characteristics from parents to offspring | 24. | combination of genes in an organism |
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© 2015
PuzzleFast.com, Noncommercial Use Only