In a certain plant, red flowers $(R)$ are dominant to white flowers $(r)$ and tallness $(T)$ is dominant to dwarfness $(t)$. A heterozygous plant $(RrTt)$ is backcrossed with a double recessive plant $(rrtt)$. If the gene loci for colour and size and situated very close together on the same chromosome, the expected percentage of offsprings could be approximately
tall red |
tall white |
dwarf red |
dwarf white |
respectively
$25\%$ |
$25\%$ |
$25\%$ |
$25\%$ |
$49\%,$ |
$49\%$ |
$1\%$ |
$1\%$ |
$49\%$ |
$1\%$ |
$1\%$ |
$49\%$ |
$1\%$ |
$1\%$ |
$49\%$ |
$49\%$ |
Describe linkage and recombination in detail.
Who used the frequency of recombination ?
If gene exchange rate is $30\%$ of the two linked genes, then the distance between these two genes is
Crossing over is
On the basis of Mendel's work which of the following laws were formulated?
$I.$ Linkage
$II.$ Segregation
$III.$ Incomplete dominance
$IV.$ Independent assortment
Choose the correct option