WarmUp 14 4113 1 What is the probability

Warm-Up #14 4/1/13 1) What is the probability of getting a heads when you flip a coin? 2) Give an example of someone who is a hybrid( use the letter T). 3) If a family has a recessive disease, what would the genotype for someone who has a ½ shaded box or circle on a pedigree (use the letter B)? 4) List the genotypes for A blood. 5) How many chromosomes are pictured below?

Unit 8 Mendelian Genetics Pre-Test Review Questions Number your own paper to 23

1) Gregor Mendel used pea plants to study • A-flowering. • B-gamete formation. • C-the inheritance of traits. • D-cross-pollination

2) The principle of dominance and recessiveness states that • A-all alleles are dominant. • B-all alleles are recessive. • C-some alleles are dominant and others are recessive. • D-alleles are neither dominant nor recessive

3) When you flip a coin, what is the probability that it will come up tails? • A 1/2 • B 1/4 • C 1/8 • D 1

4) Organisms that have two identical alleles for a particular trait are said to be • Ahybrid. • Bhomozygous. • Cheterozygous. • Ddominant.

5) Variations in human skin color is an example of • Aincomplete dominance. • Bcodominance. • Cpolygenic traits. • Dmultiple alleles.

6) A Down Syndrome individual possesses Trisomy Nondisjunction. They have how many copies of chromosome 21? • A 0 • B 1 • C 2 • D 3

7) A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). What was the probability that the offspring would be albino? • A 1/4 • B 1/2 • C 1/3 • D 1/16

8) In the P generation, a purebred tall plant (TT) is crossed with a homozygous short plant (tt). The probability that an F 1 plant will be tall is • A 25%. • B 50%. • C 75%. • D 100%.

9) The results of crossing a red snapdragon with a white snapdragon are all PINK offspring. This demonstrates the principle of • Amutation. • Bincomplete dominance. • Ccodominance. • Drecessivness.

10) Predict the OUTCOME of a cross between a heterozygous white-furred animal(Ww) and a homozygous brown -furred animal(ww) • A 100% hybrid • B 100% brown-furred • C 50% white, 50% brown • D 50% heterozygous brown, 50% heterozygous white

11) Situations in which one allele for a gene is not completely dominant over another allele for that gene are called • Amultiple alleles. • Bincomplete dominance. • Cpolygenic inheritance. • Dmultiple genes.

12) The passing of TRAITS from one generation to the next is called • Adominance • Bheredity • Cmaturation • Ddevelopment

13) A HETEROZYGOUS individual would have the genotype • ADd • BDD • Cdd • DDDD

14) The chemical factors that determine traits are called • Awater. • Btraits. • Cgenes. • Dcharacters.

15) An organism’s PHENOTYPE • ACannot be observed • BRepresents its genetic composition • CRepresents all the traits that are actually expressed; what you see • DOccurs only in dominant homozygous organisms

16) A Punnett square shows all of the following EXCEPT • Aall possible results of a genetic cross. • Bthe genotype of the offspring. • Cthe gender of the possible children in the cross • Dhow traits are passed on from one generation to the next.

17) Offspring that result from crosses between parents with different traits • Aare true-breeding. • Bmake up the F 2 generation. • Cmake up the parental generation. • Dare called hybrids.

18) Which of the following genotypes result in the same phenotype or blood type? • AIAIA and IAIB • BIBIB and IBi • CIBIB and IAIB • DIBi and ii

19) In a pedigree, a circle represents a(an) • Amale. • Bfemale. • Cchild. • Dadult.

20) Colorblindness is more common in males than in females because • A fathers pass the allele for colorblindness to their sons only. • B the allele for colorblindness is located on the Y chromosome. • C the allele for colorblindness is recessive and located on the X chromosome. • D males who are colorblind have two copies of the allele for colorblindness.

21) How many chromosomes are shown in a normal human karyotype? • A 2 • B 22 • C 44 • D 46

22) Hybrid: heterozygous as purebred: _______. • Ahorses • Bhomozygous • Chaploid. • Dincomplete.

23) What percentage of human sperm cells carry an X chromosome? • A 0% • B 25% • C 50% • D 100%

Review Question Answers 1) C 2) C 3) B 4) B 5) C 6) D 7) A 8) D 9) B 10) C 11) B 12) B 13) A 14) C 15) C 16) C 17) D 18) B 19) B 20) C 21) D 22) B 23) C