Suppose that extra fingers and toes are caused by a recessive trait, but it appears in only 80% of homozygous recessive individuals. Two heterozygotes conceive a child. What is the probability that this child will have extra fingers and toes?
A. 15%
B. 5%
C. 20%
D. 10%
E. 25%
Ans: C. 20%
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a. retinoblastoma proteins (Rb) b. cyclin-dependent kinase (Cdk) c. p53 d. p21
In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color
The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a dwarf plant with white flowers produces 1/4 tall purple, 1/4 tall white, 1/4 dwarf purple, and 1/4 dwarf white. What is the genotype of the parents? What will be an ideal response?
Which of the following proteins requires GTP in the process of LDL receptor-mediated endocytosis?
A) LDL receptor B) dynamin C) AP-2 complex D) uncoating enzyme E) clathrin
The type of bond that would form from the transfer of an electron from one atom to another, shown below, is a(n) ________ bond.
a. ionic b. covalent c. hydrogen d. isotopic d. atomic