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Warm-Up #14 4/1/13

Warm-Up #14 4/1/13. 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).

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Warm-Up #14 4/1/13

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  1. Warm-Up #14 4/1/13 • 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? Test Tomorrow

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

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

  4. 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 neitherdominantnor recessive

  5. 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

  6. 4) Organisms that have two identical alleles for a particular trait are said to be • A hybrid. • B homozygous. • C heterozygous. • D dominant.

  7. 5) Variations in human skin color is an example of • A incomplete dominance. • B codominance. • C polygenic traits. • D multiple alleles.

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

  9. 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

  10. 8) In the P generation, a purebred tall plant (TT) is crossed with a homozygous short plant (tt). The probability that an F1 plant will be tall is • A 25%. • B 50%. • C 75%. • D 100%.

  11. 9) The results of crossing a red snapdragon with a white snapdragon are all PINK offspring. This demonstrates the principle of • A mutation. • B incomplete dominance. • C codominance. • D recessivness.

  12. 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

  13. 11) Situations in which one allele for a gene is not completely dominant over another allele for that gene are called • A multiple alleles. • B incomplete dominance. • C polygenic inheritance. • D multiple genes.

  14. 12) The passing of TRAITS from one generation to the next is called • A dominance • B heredity • C maturation • D development

  15. 13) A HETEROZYGOUS individual would have the genotype • A Dd • B DD • C dd • D DDD

  16. 14) The chemical factors that determine traits are called • A water. • B traits. • C genes. • D characters.

  17. 15) An organism’s PHENOTYPE • A Cannot be observed • B Represents its genetic composition • C Represents all the traits that are actually expressed; what you see • D Occurs only in dominant homozygous organisms

  18. 16) A Punnett square shows all of the following EXCEPT • A all possible results of a genetic cross. • B the genotype of the offspring. • C the gender of the possible children in the cross • D how traits are passed on from one generation to the next.

  19. 17) Offspring that result from crosses between parents with different traits • A are true-breeding. • B make up the F2 generation. • C make up the parental generation. • D are called hybrids.

  20. 18) Which of the following genotypes result in the same phenotype or blood type? • A IAIA and IAIB • B IBIB and IBi • C IBIB and IAIB • D IBi and ii

  21. 19) In a pedigree, a circle represents a(an) • A male. • B female. • C child. • D adult.

  22. 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.

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

  24. 22) Hybrid: heterozygous as purebred: _____________. • A horses • B homozygous • C haploid. • D incomplete.

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

  26. C C B B C D A D B 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 Review Question Answers

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