Question

Place the boxes in the appropriate column. In this question, S is dominant to s. Ss X Ss Ss X ss SS X ss

_______ _______ _______
- Progeny with all the same genotype - Progeny with phenotypic ratio of 1:1 - Most of the progeny will have a dominant phenotype - Progeny with genotypic ratio 1:1 - Progeny with genotypic ratio of 1:2:1 - All the progeny will have a dominant phenotype
- Equal number of progeny with dominant and recessive phenotypes
- All progeny have recessive phenotype
- Progeny with all the same phenotype
- Progeny with phenotypic ratio of 3:1

Answer 1

A cross of Ss with Ss results in a 1:2:1 genotypic ratio and a 3:1 phenotypic ratio, a cross of Ss with ss gives a 1:1 ratio for both genotype and phenotype, and a cross of SS with ss results in all offspring having the dominant phenotype.

Step-by-step explanation:

Understanding Genetic Crosses

When analyzing genetic crosses, we can use Punnett squares to predict the genotypic and phenotypic outcomes of a cross. For the genotype Ss (where S is dominant), a cross between Ss and Ss individuals will result in a genotypic ratio of 1:2:1 (SS:Ss:ss), and a phenotypic ratio of 3:1, with three dominant and one recessive phenotype.

A cross between Ss and ss individuals will yield a genotypic and phenotypic ratio of 1:1, as there will be an equal chance of getting Ss or ss offspring.

Finally, a cross between SS and ss individuals will result in progeny that all have the dominant phenotype, with a genotype of Ss, as the S allele is dominant over the s allele.

Answer 2

The appropriate column placement for the given genotypes is as follows: progeny with all the same genotype: SS, progeny with phenotypic ratio of 1:1: Ss, ss, most of the progeny will have a dominant phenotype: SS, Ss, progeny with genotypic ratio 1:1: SS, Ss, progeny with genotypic ratio of 1:2:1: SS, Ss, ss, all the progeny will have a dominant phenotype: SS, Ss, equal number of progeny with dominant and recessive phenotypes: SS, ss, all progeny have recessive phenotype: ss, progeny with all the same phenotype: SS, Ss, progeny with phenotypic ratio of 3:1: SS, Ss, ss.

Step-by-step explanation:

In this case, the dominant allele for coat color is represented by 'S' and the recessive allele is represented by 's'. When two individuals with genotype Ss are crossed, there are three possible genotypes for the offspring: SS, Ss, and ss. According to the given information, S is dominant to s, which means that individuals with genotype SS or Ss will have a dominant phenotype, while those with genotype ss will have a recessive phenotype. Therefore, the appropriate column placement for the given genotypes would be as follows:

1. Progeny with all the same genotype: SS
2. Progeny with phenotypic ratio of 1:1: Ss, ss
3. Most of the progeny will have a dominant phenotype: SS, Ss
4. Progeny with genotypic ratio 1:1: SS, Ss
5. Progeny with genotypic ratio of 1:2:1: SS, Ss, ss
6. All the progeny will have a dominant phenotype: SS, Ss
7. Equal number of progeny with dominant and recessive phenotypes: SS, ss
8. All progeny have recessive phenotype: ss
9. Progeny with all the same phenotype: SS, Ss
10. Progeny with phenotypic ratio of 3:1: SS, Ss, ss