It is difficult to determine the sex of very young chickens, but it is easy to tell, by visual observation, whether the feathers are "barred." The barred pattern is inherited as a sex-linked dominant trait. This trait is used regularly by chicken breeders who receive orders for only male or female chicks and must be able to deliver the appropriate sex of very young birds. Determine whether the male and female parents should be taken from normal or barred true-breeding lines in order for the sex of all chicks to be determined at the time of hatching. Show the Punnett square for the mating you select, to confirm that the desired phenotypes result. (Note: In birds, sex is determined as follows: XX = male, XO = female; only the X chromosome carries sex-linked genes.) Basically, you want to get a situation where all the males are one color type and all the females are the other.

climate change and pollution

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.