1. Unattached ear lobes (EE or Ee) are dominant over attached earlobes (ee). A c
ID: 19694 • Letter: 1
Question
1. Unattached ear lobes (EE or Ee) are dominant over attached earlobes (ee). A couple both have unattached earlobes. Both notice that one of their parents on each side has attached earlobes. The couple will have 4 children.A. They can be certain that 3 will be heterozygous and 1 homozygous recessive
B. If the first 3 are heterozygous the 4th must be homozygous recessive.
C. The children must repeat the parents genotype
D. All children must have unattached earlobes - because both parents possess the dominant gene.
E. 3 heterozygous and 1 homozygous is a likely outcome but other possibilities include all heterozygous, or 2 , 3, or all 4 homozygous is also possible.2. Which is NOT true according to Mendel
Explanation / Answer
1) E (since both parents are Ee, the frequency of heterozygous becomes greater) 2) B (They're not always different) 3) D (recessive means to have no dominant alleles) 4) B (exactly what it means) 5) D (C always pairs with G) 6) D (U always pairs with T) 7) E (T during DNA, U during RNA)
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