Question 1
The alleles of linked genes tend to ________.
◦ segregate together during gamete production
◦ assort independently
◦ be mutated more often than unlinked genes
◦ experience a higher rate of crossing over
◦ assort independently and show a higher rate of crossing over
Question 2
The order of genes on a plant chromosome is
A,
B, and
D, where A and B have a recombination frequency of 0.2, and
B and
D have a recombination frequency of 0.3. A pure-breeding plant that has the dominant
A and
D phenotypes with a recessive b phenotype is crossed to a pure-breeding plant that has the recessive a and d phenotypes with the dominant B phenotype. The resulting hybrid is crossed to a plant that has all three recessive phenotypes. Under the assumption that the value for interference in this region is zero, what percentage of each progeny type would result from a single crossover between
B and
D?
◦ 24%
ABd/ abd; 24%
abD/ abd◦ 7%
ABD/ abd; 7%
abd/ abd◦ 12%
Abd/ abd; 12%
aBD/ abd◦
50% AbD/ abd; 50%
aBd/ abd◦ 9%
ABD/ abd; 9%
abd/ abd
Vacuoles in Plant Cells Are Usually Large
Women who are monozygotic twins and have the same genes are more similar in their marital happiness
The Meselson–Radding model for homologous recombination
DNA Hypermethylation of Number of Known Genes
Life Table for an Annual Plant Cohort
Interphase chromosome territories