Download Study guide: Ch 4: Due Thursday (Test Friday)

Study guide: Ch 4: Due Thursday (Test Friday)
1:What is the blood type of a child born to two parents with the genotypes
IAIA and IBIB for blood type? AB
2: A carrier is a person who has one recessive allele and one dominant
allele
3: What controls variations in skin color among humans? At least 3-4 genes
4:How does geneticist use pedigrees? Trace inheritance of traits over
generations.
5:What must occur for a girl to be colorblind? parents must have the
recessive allele for colorblindness
6: Which trait is controlled by a gene with multiple alleles? Blood type
7:Genetic disorders are caused by? Mutations
8:Cloning results in two organisms that are genetically identical
9:What is a pedigree? Chart that traces which members have a particular
trait.
10:Which genetic disorder produces unusually thick mucus in the lungs and
intestines? Cystic fibrosis
11:Sex linked genes are genes on X and Y-chromosomes.
12:Which form of selective breeding crosses parents with the same or
similar sets of alleles? Inbreeding
13:Why are sex-linked traits more common in male than females? A
recessive allele on the x chromosome will produce the trait.
14:No two people have the same DNA except for identical twins
15: What procedure helps doctor diagnose a genetic disorder before a baby
is born? Amniocentesis
16: Down syndrome most occurs when? Chromosomes fail to separate
properly during Meiosis.
17: Which combination of sex chromosomes results in a male human being?
XY
18:What is the purpose of the Human genome project? Identify DNA
sequence of each gene.
19:What is a genome? DNA in one cell
20:How do police use DNA fingerprinting to solve the crimes? Comparing
suspect’s DNA with the evidence.
22:What is a Karyotype?
23:What factors can affect a person’s height? Genes and environmental
factors.
25:Which genetic disorder results in abnormally shaped blood cells? Sickle
cells.
26:Which human trait is altered by variations in the environment? Height
27:Hemophilia is caused by? Recessive allele on X chromosome
28:Why does height in human have such a wide variety of phenotype?
Controlled by atleast 4 genes
29: How can genetic counselors predict genetic disorders? KAryotypes and
pedigree
30: Which form of selective breeding crosses genetically different
individuals to keep the best traits of both parents? Hybridization
31: Practice drawing Pedigree (Case Study 1) on page 130.