Bio 114 Final Exam (Chapter 14, 15, 16) Questions and Correct Answers
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Course
BIO 114
Institution
BIO 114
Two black female mice are crossed with a brown male. In several litters, female 1 produced 9 blacks and 7 browns; female 11 produced 57 blacks. What deduction can you make concerning the inheritance of black and brown coat color in mice? What are the genotypes of the parents in this case? female 1 ...
Bio 114 Final Exam (Chapter 14, 15, 16)
Questions and Correct Answers
Two black female mice are crossed with a brown male. In several litters, female 1
produced 9 blacks and 7 browns; female 11 produced 57 blacks. What deduction can
you make concerning the inheritance of black and brown coat color in mice? What are
the genotypes of the parents in this case? ✅female 1 is Bb, female 11 BB, and the
male bb
Recall that hemophilia is an X-linked recessive disease. If a woman with hemophilia had
children with a man without hemophilia, what is the chance that their first child will have
the disease? What is the chance of that their first child will be a carrier? ✅50%
because all sons have hemophilia. The chance of boy 50%. 50% because all daughters
are carriers.
What problems would arise if the genetic code contained only 22 codons- one for each
amino acid, a start signal, and a stop signal? ✅every copying error and any mutations
in DNA would result in wrong amino acids.
The pattern of genetic inheritance shown below represents what typeof genetic
disorders? ✅Sex-linked recessive
The pattern of genetic inheritance shown below represents what type of genetic
disorders? ✅autosomal recessive
What is an outcome of genetic recombination? ✅the new combination of maternal and
paternal chromosome segments that result when homologs cross over.
In studies of how trait are inherited, what makes certain species candidates for model
organisms? ✅they are easy to maintain, have a short life-cycle, produce many
offspring, and yield data that are relevant to many other organisms.
The alleles found in haploid organisms cannot be dominant or recessive. Why?
✅dominance and recessiveness describe which allele is expressed in phenotype when
more than one different alleles occurs in that same individual.
In peas, purple flowers are dominant to white. If a purple flowered, heterozygous plant
were crossed with a white flowered plant, what is the expected ratio of genotypes and
phenotypes among the F1 offspring? ✅1 purple: 1 white
Why is the pea wrinkled-seed allele a recessive allele? ✅the trait associated with the
allele is not exhibited in heterozygous individuals.
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