Question

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Practice Using a Punnett Square. Punnett Squares are tools to identify outcomes known genotypes. They can be used to help infer probabilities of genotypes and from a particular cross. of possible crosses between individuals of phenotypes amongst offspring lele forms "A" and "a". A woman is heterozygous, so she can produce eggs with Consider a gene with all 9. and Write them across the top of the Punnett Square below the following alleles: allele forms "A" and a". A man is heterozygous, so he can produce sperm with the 10. Consider a gene with Populate each cell of the Punnett Square below with the allele indicated from eggs above and the recessive alleles; use "Aa" instead of "aA", regardless of where the alleles came from, egg or sperm. Write them along the side of the Punnett Square below. following alleles: and following alleles:--and-- allele indicated from sperms to the side. Each box of the cell should have two alleles, one from an egg a a sperm to the side. To keep things simple, always arrange dominant alleles in a hetero Egg Allele #2 Egg Allele Ri: Sperm Anele #2 11. What are the possible combinations of alleles (genotypes) that you can identify? and -, and 12. What would be the % of each combination (genotypes)?- 13. What is the ratio represented by the different genotypes? Recessive Traits, A couple is going to have a baby. They are concerned about sickle cell anemia, which results from having the homozygous recessive combination of the sickle cell gene ("s"), which produces abnormal hemoglobin. Having at least one normal version of the gene ("G") results in normal hemoglobin. The woman is heterozygous, and so is the man. 14. What alleles does mom have?andWrite them across the top of the Punnett Square below. 15. write them along the side of the Punnett Square below. what all eles does dad have?--and Populate each cell of the Punnett Square with the allele indicated from eggs above and the allele indicated from sperms to the side. Each box of the cell should have two alleles, one from an egg above, and the second from a sperm to the side. ES Allele #2 Ege Allele i: Allele #1:- Allele 2: and 16. What are the possible combinations of alleles (genotypes) that you can identify? 17. What are the possible phenotypes that you can identify? and 18. What is the ratio represented by the different phenotypes? 19. What is the possible % of children produced with the disorder (sickle cell anemia)?

Answer 1

1. external appearance is called phenotype.for examples in human ,phenotype can be hair color,body color etc
2. what kinds of gene we have is called genotype. genotype says what the different genes we have are and what is their nature
3. for homozygous dominant is AA
4. for heterozygous is Aa
5. for homozygous recessive is aa
6. "A" and "A " are kind of allele in the gametes of homozygous dominant individual.
7. "A" and "a" are kind of allele of heterozygous
8. "a" and "a" are kind of allele in the gametes of heterozygous recessive individual.
9. a woman have "A" and "a" allele
10. a men have "A" and "a" allele

    	A	a
    A	AA	Aa
    a	Aa	aa

11. AA,Aa and aa

12. AA is 25% ,Aa is 50% and aa is 25%

13. 1:2:1

14. a mom have G and g

15. dad have G and g

    	G	g
    G	GG	Gg
    g	Gg	gg

16. GG,Gg and gg

17. 75 % of normal hemoglobin and 25% of abnormal hemoglobin ( 3 [ GG ,Gg ] and 1 gg )

18. 3:1

19. 25% having a disease.