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1 To the winner… 15% bonus added to their test
Chapter 16 To the winner… 15% bonus added to their test

2 What personal characteristics and events in Gregor Mendel's life significantly contributed to his ultimate contribution to the study of inheritance?  His training in physics and mathematics at the University of Vienna. He failed his physics exam. He failed his natural history exam. He got his teaching license at the age of 21. He got a job as a substitute teacher and enjoyed it. :01

3 Mating a purebred Labrador retriever to a purebred poodle to produce "Labradoodles" is an example of 
true-breeding. hybridization. self-fertilizing. inbreeding. mixed breeding. 30

4 There are many varieties with distinct and different characteristics.
Which of these is NOT a reason that Mendel used pea plants as a model to study inheritance?   There are many varieties with distinct and different characteristics. They cannot self-fertilize. It is easy to control cross-fertilizations. The varieties he chose would show the same variant for a trait in generation after generation. They have large flowers. :30

5 P generation / true breeding F1 generation / monohybrid
Which of the following are incorrectly matched for a single-factor cross?    P generation / true breeding F1 generation / monohybrid F2 generation / result of F1 cross F1 generation / result of P cross F2 generation / result of P cross :30

6 yellow is dominant and smooth is recessive.
A cross of a true-breeding smooth pod and yellow pod plants results in all smooth pod offspring. This indicates that   yellow is dominant and smooth is recessive. smooth is dominant and yellow is recessive. yellow and smooth are not alleles. yellow and smooth are variants of the same gene. two of the answers are correct. Yellow and smooth are variants of the same gene, and smooth is the dominant trait. :30

7 Participant Leaders Points Participant 4 17 2 8 20 1 10 32 19 7 3 22
13 21 11 12 14 15

8 100% freckled, 100% heterozygous 75% freckled, 50% heterozygous
A male is heterozygous for the trait that produces freckles on the skin, and he has freckles. If he marries a woman who is also heterozygous for freckles, ______ percent of their children will be freckled and __________ percent of their children will be heterozygous.   100% freckled, 100% heterozygous 75% freckled, 50% heterozygous 75% freckled, 25% heterozygous 50% freckled, 50% heterozygous 100% freckled, 75% heterozygous :30

9 How can you determine the genotype of a plant showing the dominant phenotype of red color?  
The phenotype reflects the genotype, so the plant must be homozygous for the trait.  Cross the red plant with a white plant to see if any white plants appear. Cross the red plant with other red plants to see if any white plants appear. Cross the red plant with a white plant to see how many red plants appear. Cross the red plant with another red plant, and then cross the F1 population with each other to see if any white plants appear. :30

10 The single-factor crosses performed by Mendel support the observation that  
the two alleles for a given gene are distributed randomly among an individual's gametes. the two alleles for a given gene are found within the same gamete. if the recessive alleles for two different genes are on the same chromosome, they will never be found within the same gamete. only the dominant alleles for a given trait are found in an organism's gametes. if the dominant alleles for two different genes are on different chromosomes, they will never be found within the same gamete. :30

11 The two-factor crosses performed by Mendel support the observation that   
alleles for a given trait are distributed randomly among an individual's gametes independent of the alleles for other traits. traits that are encoded by genes on different chromosomes are never found within the same gamete. the F1 generation can display phenotypes in combinations different from those seen in the P generation. the F2 generation will only display phenotypes in the same combinations as the P generation. self-fertilization of the F1 generation will produce 100% heterozygous plants at both loci. :30

12 2; if they are on the same chromosome
An organism that is heterozygous for two traits can produce a maximum of _______ different gametes for these traits.    2 4 2; if they are on the same chromosome 4; only if they are on different chromosomes 8 :30

13 Participant Leaders Points Participant 7 22 3 13 17 1 19 2 32 5 10 4
12 14 20 11 15 21 8

14 Which of the following INCORRECTLY states a principle of the chromosome theory of inheritance? 
Genes are transmitted from parent to offspring via chromosomes. Gametes contain either a maternal or paternal set of chromosomes. Somatic cells contain a maternal and paternal set of chromosomes. The paternal and maternal chromosomes assort randomly during meiosis. Gametes are haploid and somatic cells are diploid. :30

15 A homologous pair of sister chromatids will possess _______ copies of the alleles for each locus.   
2 4 8 1 50% of the :30

16 63 purple dwarf; 28 purple tall; 27 white dwarf; 7 white tall
Which of the following accurately gives the distribution of phenotypes produced from a cross of purple dwarf pea plants that are heterozygous for flower color and plant height?   63 purple dwarf; 28 purple tall; 27 white dwarf; 7 white tall 132 purple dwarf; 138 white tall 54 purple dwarf; 6 white tall 100% purple dwarf 27 purple dwarf; 28 purple tall; 31 white dwarf; 29 white tall :30

17 What features of meiosis allow for independent assortment of chromosomes? 
random alignment of homologous sister chromatids on the metaphase plate separation of sister chromatids reduction of chromosome number from diploid to haploid both the separation of sister chromatids and the reduction of chromosome number from diploid to haploid All of these features allow for the independent assortment of chromosomes. :30

18 The probability of obtaining a dominant phenotype from self-fertilization of a heterozygous individual is   1/4 1/2 3/4 100% :30

19 5 More Questions… Points Participant 10 17 4 8 19 21 22 3 32 14 5 12 1
20 2 11 7 13 15

20 Cytogenetic is A photographic representation of chromosome.
The field of genetics that involves the microscopic examination of the chromosomes and cell division. The sorting process to divide one cell nucleus into two nuclei. The process by which the haploid cells are produced from a cell that was originally diploid. 10

21 DNA associates very tightly with nucleosomes because
DNA can form covalent bonds with histone proteins. negative charges on DNA are attracted to positive charges of the histone proteins. the histone tails wrap tightly around the DNA double helix. the amino acids of histone proteins are largely acidic, while DNA molecules are basic. 10

22 During metaphase, heterochromatin is converted to euchromatin.
chromosomes are about 30 nm wide. chromosomes are much shorter than they were in interphase. chromosomes undergo gene transcription. the "beads on a string" structure is visible. 10

23 Which of the following statements is correct about the cell cycle?
The cell cycle is a sequence of replication and division that produces a new cells. The phase of the cell cycle are G1, S, and M phases. In actively dividing cells, the S and G2 phases are collectively known as interphase. When the S phase of the cell cycle is finished, a cell actually has twice as many chromatids as the number of chromosomes in the G1 phase. 1

24 Humans have __________ different types of autosomes.
46 44 23 22 11 1

25 Team Scores Points Team


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