The cross AaBb × AaBb is an example of a _______ cross and the results of such crosses led Mendel to propose what we now call the law of _______.
A: test; segregation of genes
B: test; independent assortment
C: dhybrid; independent assortment
D: self; segregation of genes
E: dihybrid; segregation of genes
Answer: C: dhybrid; independent assortment
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You perform a cell free translation experiment like Nirenberg and Matthaei, but you forget to write down what nucleotides you added to make the mRNA
You precipitate the translated polypeptides and measure the relative amount of radiolabeled amino acids incorporated into them. You get 25% proline, 25% threonine, 12.5% glutamine, 12.5% lysine, 12.5% asparagine, and 12.5% histidine. What nucleotides and in what % did you add to make the mRNA? A. Equal amounts of A, C, U, and G B. 50% C and 50% A C. 70% C and 30% A D. 50% C and 50% U E. 50% A and 50% G
The field of parasitology involves the study of which of the following types of organisms?
A) arthropods, bacteria, fungi, protozoa, and viruses B) arthropods, helminths, and certain protozoa C) bacteria, fungi, and protozoa D) bacteria, fungi, and viruses
In the United States, most newborns undergo a screening test for up to 60 genetic disorders. A few drops of blood is taken from each baby and the levels of various blood components are determined. The screening identifies babies who might have a genetic disorder, but is not diagnostic. Further testing is required if the screen shows a blood component is out of the normal range. Which of the following technologies could potentially be a low-cost replacement for the current newborn screening and would directly test most babies for the presence of many genetic disorders?
A) PCR to amplify the PKU gene B) exome sequencing and comparison with known mutations in databases C) DNA fingerprinting using CODIS SSRs D) preimplantation genetic diagnosis
Which autosomal recessive condition results in accumulation of phenylalanine?
a. cystic fibrosis b. PKU c. Tay-Sachs disease d. Marfan syndrome e. achondroplasia