Very briefly describe how economic forces influenced Mendel’s work. Which one of
ID: 212951 • Letter: V
Question
Very briefly describe how economic forces influenced Mendel’s work.
Which one of the following features is the most important when using peas as a genetic model organism?
A. Peas could also be used as a food source.
B. Peas were inexpensive.
C. Peas have seven chromosomes.
D. The pollination of peas can be controlled by the experimenter.
E. Peas come in different colors.
Which term best completes this statement: When an organism is true breeding it is ________________.
A. Dominant
B. Recessive
C. A homozygote
D. A heterozygote
When a tall plant (AA) is crossed to a short plant (aa), and all of the many offspring are tall, then you can conclude that:
A. The (A) allele is dominant to the (a) allele
B. The (a) allele is dominant to the (A) allele
C. The tall phenotype is dominant to the short phenotype.
D. The short phenotype is dominant to the tall phenotype.
You are working with an ornamental flower that shows two color phenotypes, red or white. The flower color is controlled by the A gene (A or a). These plants can either self-fertilize or cross with another plant. You have two plants: Plant 1 and Plant 2.
You set up the mating experiment #1 above. From the following statements, select all that could be true (that is, are consistent with the data, allowing for reasonable statistical fluctuations). Consider each answer as an independent statement. A true-breeding plant is homozygous for the trait of interest.
A. Plant 1 and Plant 2 are both true-breeding.
B. The red phenotype is dominant to the white phenotype.
C. The white phenotype is dominant to the red phenotype.
D. Both Plant 1 and Plant 2 have the genotype Aa.
E. Plant 1 is true breeding, and Plant 2 is Aa.
F. Plant 1 is a Aa, and Plant 2 is true breeding.
Select the option that correctly completes the following statement.
When a diploid cell with 48 chromosomes (24 pairs) undergoes meiosis, each of the resulting ______ gametes will have _______ chromosomes.
A. 2, 48
B. 4, 48
C. 2, 24
D. 4, 24
E. 2, 12
F. 4, 12
Number of progeny with following phenotype Experiment Red White #1: Plant 1 (red) with Plant 2 (red) 100 0Explanation / Answer
1.D) Mendel used pea plants because of their pollination(cross or self ) can be controlled.
2.c) True breeding = Homozygous organisms
3.A) As allele can be dominant not phenotype.
4.A,B,E,F, are true and D, E are false.
5.D) after meiosis number of gametes is 4 and number of chromosomes will be 24 ( 2n =48).
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