HUMAN BIOLOGY

Chromosomes and human GenetiCs 395 wHat are some inHeritance patterns for tHe X cHromosome? A trait that shows up most often in ...

396 Chapter 20 ABC D EFGH JI ABDE FGHJI deletion of segment C (Figure 20.13). the technology for rapid, low-cost genetic screeni ...

Chromosomes and human GenetiCs 397 deletion Loss of part of a chromosome. duplication Repetition of a sequence of nucleotides in ...

398 Chapter 20 individual will have three of one type of chromosome (2n 1 1). If the gamete is missing a chromosome, then the re ...

Chromosomes and human GenetiCs 399 wHat causes cHanges in tHe normal number of cHromosomes? Most changes in the chromosome numb ...

400 Chapter 20 eXpLore on your own In autosomal dominant inheritance, a dominant allele usually is expressed to some degree. sec ...

Chromosomes and human GenetiCs 401 The probability of a crossover occurring between two genes on the same chromosome. a. is unr ...

402 Chapter 20 If a trait appears only in males, is this good evidence that the trait is due to a Y-linked allele? Explain why ...

DNA analysis requires only a few drops of blood or a smear of epithelial cells from the skin or inside of the cheek. It is the f ...

404 Chapter 21 n DNA is built of nucleotides—the subunits of the biological molecules called nucleic acids. DNA nucleotides are ...

DNa, GeNes, aND BioteChNoloGy 405 What is a DNa molecule? A DNA molecule consists of two strands of nucleotides held together a ...

406 Chapter 21 Some genetic defects result in “inborn errors of metabolism.” These disorders arise when an enzyme vital to some ...

DNa, GeNes, aND BioteChNoloGy 407 hoW is DNa replicateD? In DNA replication, enzymes and other proteins unwind the double helix ...

408 Chapter 21 tRNA a nucleic acid chain that can bring a (transfer RNA) specific amino acid to the mRNA/ ribosome complex durin ...

DNa, GeNes, aND BioteChNoloGy 409 exons Nucleotide sequences in mRNA that carry the protein-building instructions of DNA. intron ...

410 Chapter 21 What is the geNetic coDe? The genetic code is a set of sixty-four different groups of three mRNA bases called co ...

DNa, GeNes, aND BioteChNoloGy 411 What Do rrNas aND trNas Do? rRNAs and proteins form subunits that combine into ribosomes. Dif ...

412 Chapter 21 translation The phase of protein synthesis in which amino acids are assembled into a chain, the primary structure ...

DNa, GeNes, aND BioteChNoloGy 413 hoW is mrNa traNslateD iNto proteiN? Translation begins when a small ribosome unit and an ini ...

414 Chapter 21 genetic engineering Insertion of purposely modified genes into an organism. genome All the DNA in one (haploid) s ...