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GENETICS VOCABULARY Chapter 7

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GENETICS VOCABULARY

Chapter 7

1. Mitosis

■ The process in which a cell’s nucleus divides

into two new nuclei, each with the same

number of chromosomes.

http://www.evh.k12.nf.ca/rbaker/Bio%203201/The%20Cell%20Cycle/mitosis.

gif

http://www.evh.k12.nf.ca/rbaker/Bio 3201/The Cell Cycle/mitosis.gif

Page 3: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

2. Heredity

■ The passing of traits from parents to offspring.

http://learn.genetics.utah.edu/content/begin/traits/images/earlobes.jpghttp://learn.genetics.utah.edu/content/begin/traits/images/hairline.jpg

http://learn.genetics.utah.edu/content/begin/traits/images/earlobes.jpg

http://learn.genetics.utah.edu/content/begin/traits/images/hairline.jpg

3. Gene

■ A sequence of DNA that determines a trait and

is passed from parent to offspring.

http://www.genomenewsnetwork.org/gnn_images/w

hats_a_genome/gene.gif

http://4.bp.blogspot.com/_dRj9DN75euI/Ry-

Vlyer_XI/AAAAAAAAAP8/-KriwUeTtB4/s400/eyes-400.jpg

http://www.genomenewsnetwork.org/gnn_images/whats_a_genome/gene.gif

http://4.bp.blogspot.com/_dRj9DN75euI/Ry-Vlyer_XI/AAAAAAAAAP8/-KriwUeTtB4/s400/eyes-400.jpg

Page 5: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

4. Allele

■ The different forms of a gene.

http://www.cubocube.com/files/images/opengenetics/chapter3/image3.png

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5. Dominant Allele

■ An allele whose trait always shows up in the

organism when the allele is present.

https://o.quizlet.com/Fhs26vUSX9EXX4bIJCvrDw_m.jpg

Page 7: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

6. Recessive Allele

■ An allele that is hidden whenever the

dominant allele is present.

http://genetics.thetech.org/sites/default/files/RedheadFrecklesDR.jpg

Page 8: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

7. Punnett Square

■ A chart that shows all the possible

combinations of alleles that can result from a

genetic cross.

http://study.com/cimages/multimages/16/Punnett_hetero_x_hetero.svg.p

Page 9: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

8. Phenotype

■ An organism’s physical appearance, or visible

traits.

https://o.quizlet.com/Fhs26vUSX9EXX4bIJCvrDw_m.jpg

Page 10: Genetics Vocabulary...3. Gene A sequence of DNA that determines a trait and is passed from parent to offspring. hats_a_genome/gene.gif

9. Genotype

■ An organism’s genetic makeup, or allele

combinations.

https://o.quizlet.com/Fhs26vUSX9EXX4bIJCvrDw_m.jpg

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10. Homozygous

■ Having two identical alleles for a particular

gene.

http://rmascience.weebly.com/uploads/9/2/2/3/9223506/6102278_orig.gif

11. Heterozygous

■ Having two different alleles for a particular

gene.

http://1.bp.blogspot.com/-

D7TNfP8EZRo/TX6ORvCO52I/AAAAAAAAABw/Z84kiPOKNPc/s1600/Dibujo8.bm

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12. Meiosis

■ The process that occurs in the formation of sex

cells (sperm and egg) by which the number of

chromosomes is reduced by half.

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