In a Drosophila, black eye colour is dominant over
brown eye and allele for normal wings is dominant
over allele of vestigial wing. Hybrid obtained in
F1 generation have black eye colour with normal
wing. By selfing of F1 hybrid, total 560 offspring were
obtained in F2 having four different genotypes. How
many flies with black eyes and vestigial wings; and brown eyes with normal wings would be obtained?
What would be their possible genotypes?
A105--- 210--- BBWw--- bbWw
B 105--- 105--- Bbww--- bbWw
C 315--- 35--- BbWw--- Bbww
D 100--- 150--- bbww--- BBww
Pls provide an explanation
A few mixtures are listed in the box.
(i) Salt solution (ii) Oil and water (iii) Alcohol and water (iv) Soda water (v) Iron and sand (vi) Flour and husk (vii) Milk
Now, read the given passage and fill in the blanks by selecting an appropriate option. Mixtures (p) are homogeneous in nature while mixtures (q) are heterogeneous in nature. Mixture(s) (r) is/are separated into its/their components by centrifugation where (s) component collects towards the centre. Mixture (t) is separated into its components by distillation where the component having (u) boiling point gets collected in the receiver flask first.
|A||i, ii, vi||iii, iv, v, vii||ii, v||Heavier||iii||Higher|
|B||ii, iv, vi||i, iii, v, vii||ii, iv||Lighter||vii||Lower|
|C||i, iii, iv||ii, v, vi, vii||vii||Lighter||iii||Lower|
|D||i, iii, vi||ii, iv, v, vii||iv, vii||Heavier||i||Higher|
Read the given statement regarding soil X and select the correct statement regarding it.
Soil X is sticky, it can hold a lot of water and there is very little space for air between the particles.
AMost plants grow well in it.
BIt is used to make toys, flower pots, idols, etc.
CIt is a mixture of sand and clay.
DIt is mostly found on the seashore and in the desert.
Sugar can be separated from its solution because
A Mixing of sugar in water is a permanent change
B Mixing of sugar in water is an exothermic process
C Mixing of sugar in water is a change that can be reversed by evaporation
D Mixing of sugar in water is a change that can be reversed by filtration.
Observe the given figure carefully and select the correct statement.
AProcesses P and R are exothermic.
BProcesses S and R are exothermic.
CProcesses S and R are endothermic.
DProcesses P and Q are endothermic.
Study the diagram shown below which shows X, Y and Z as three states of water.
Which arrows, K, L, M or N, represent the processes of freezing and boiling?
WHY THIS QUESTION ANSWERS C
Earthquakes at two places A and B were measured by a seismograph which recorded the magnitude as 2 and 4. The magnitude of tremors and the destructive energy at A and B can be compared as
A Tremors at B are two times those at place A
B Tremors at B are four times those at place A
C Tremors at B are 100 times those at place A
D Tremors at B are 1000 times those at place A.
pls tell how to calculate