1)Free earlobes is dominant. Two parents with free earlobes have six children wi
ID: 176357 • Letter: 1
Question
1)Free earlobes is dominant. Two parents with free earlobes have six children with free earlobes and one child with attached earlobes. What are the genotypes of the parents? What are the genotypes of the six free lobed children?2. Freckles are dominant. A nurse hands a freckled baby to a non-freckled couple, is it likely to be theirs? Why or why not?
3. Tongue rolling is dominant. Tom can roll his tongue but he has never met his parents. What is the tongue rolling status of his parents?
4. Colorblindness is X-linked recessive. A man has three normal vision sons and one colorblind daughter. What is this man’s genotype? What is his wife’s genotype? 1)Free earlobes is dominant. Two parents with free earlobes have six children with free earlobes and one child with attached earlobes. What are the genotypes of the parents? What are the genotypes of the six free lobed children?
2. Freckles are dominant. A nurse hands a freckled baby to a non-freckled couple, is it likely to be theirs? Why or why not?
3. Tongue rolling is dominant. Tom can roll his tongue but he has never met his parents. What is the tongue rolling status of his parents?
4. Colorblindness is X-linked recessive. A man has three normal vision sons and one colorblind daughter. What is this man’s genotype? What is his wife’s genotype? 1)Free earlobes is dominant. Two parents with free earlobes have six children with free earlobes and one child with attached earlobes. What are the genotypes of the parents? What are the genotypes of the six free lobed children?
2. Freckles are dominant. A nurse hands a freckled baby to a non-freckled couple, is it likely to be theirs? Why or why not?
3. Tongue rolling is dominant. Tom can roll his tongue but he has never met his parents. What is the tongue rolling status of his parents?
4. Colorblindness is X-linked recessive. A man has three normal vision sons and one colorblind daughter. What is this man’s genotype? What is his wife’s genotype?
Explanation / Answer
1. Free Earlobes are dominant (Ee)
The genotypes of parents is Ee X Ee
The genotypes of 6 chldren are : EE, EE, Ee, Ee, Ee and ee
2. Freckles are dominant (FF). Nonfreckeled parents have genotype (ff). Therefore, freckled baby do not belong to nonfreckled parents. Unless there is one copy of freckled allele in one or both the parents, the baby cannot inherit the dominant character of freckles.
3. Tongue rolling is a dominant character. The genotype of Tom must be either TT or Tt. The dominant character might be inherited from his parents. Therefore, genotypes of parents would be TT in both parents or TT and Tt or Tt and Tt or TT and tt or Tt and tt.
4. Colorblindness is a X linked recessive disorder. The father with colorblind recessive allele may inherit the character to his daughter and daughters are mostly carriers unless the mother also carries the trait. Affected mother's inherit the trait to their sons. Therefore, the father must be having genotypeXc Y and mother having genotype XX to produce three normal sons and carrier daughter.
male / female E e E EE Ee e Ee eeRelated Questions
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