Quizzes 1-3 Flashcards
In the cross where Tt x Tt where tall (T) is dominant over short (t), you would expect _____ of the Fl to be tall.
3/4
The number of DNA molecules per cell is halved during ____
none of the above (telophase/cytokinesis)
A cell in G1 has 6 chromosomes.
When this cell is in
Anaphase I, there will be
chromosomes and
DNA molecules per cell.
6:12
Crossing over occurs between ____ during _____
homologous chromosomes; prophase 1
Individual chromosomes line up at the Metaphase plate during
mitosis, meiosis 1 and meiosis 2
Suppose you are making a Punnett square to predict the outcome of self-fertilizing a plant with genotype AaBb. (Assume the A and B loci are on different chromosomes.) The genotypes you use to label the boxes along the top and side of the Punnett square would be
AB, Ab, aB, ab
AB × AABB is an example of a testeross.
False
If you roll a die twice, what is the probability of rolling an even number both times?
1/4
Suppose you performed a cross with 4 possible phenotypic outcomes (e.g. purple, round; purple, wrinkled; yellow, round; and yellow, wrinkled). If you are performing a chi-square test with the data from this cross, the degree(s) of freedom is/are
3
Suppose you performed a cross with 4 possible phenotypic outcomes (e.g. purple, round; purple, wrinkled; yellow, round; and yellow, wrinkled). After analyzing the results of the cross, you obtain a chi-square value of 9. You conclude
there is significant difference between observed and expected values; you reject the null hypothesis
If you cross parents with genotypes AaBbCC x AaBBcc, what proportion of F1 progeny will have the genotype AaBbCc?
1/4
Which of the following is an example of a testeross?
AaBb x aabb
In peas, the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). A certain pea plant
is the number of round (R)
has the genotype Rr.
alleles present in a cell in prophase I from this plant.
2
In watermelons, bitter fruit (B) is dominant over sweet fruit (b) and yellow spots (Y) is dominant over no spots (y). If you do a testcross with a plant with genotype BbYy, you expect _____ of the offspring to be sweet with yellow spots.
1/4
Suppose yellow (Y) is dominant over green (y) for seed color. You cross a plant with yellow seeds with a plant with green seeds and find that 10 plants have yellow seeds and 10 have green seeds in the Fl. What were the genotypes of the parents?
Yy and yy
