In humans, long eyelashes (L) are dominant to short eyelashes (l) and wet ear wax (W) is dominant to dry ear wax (w). Assume the genes for eyelash length and ear wax consistency are on different chromosomes and assort independently. Two heterozygous individuals meet on match and have a child. What is the chance that the child has long eyelashes and dry ear wax?

Explanation:

Given:

Long eyelashes (L) are dominant to short eyelashes(l), So L is dominant on l.

Wet ear wax (W) is dominant  dry ear wax (w) , so W is dominant on w.

Two heterozygous parents are...

LlWw and LlWw

F1 generation

3 child have long eyelashes and dry wax = L_ww .

There is 3/16 ( 3 out of 16) chances that the child have long eyelashes and dry ear wax and their genotype is  L_ww.

2 different types of genes are given,

long lash (L) and short lash (l)

wet ear wax (W) and dry ear wax ( w)

here two heterozygous individuals are crossed

LLww × llWW

         ↓

     LlWw    ( F1 gen)

         ↓

 (1)  LL  (2) Ll   (1) ll    [ as 1:2:1 ( 1= dominant and recessive but 2= hybrid)]

(1) WW (2)  Ww (1) ww

          ↓

1 LLWW   2 LLWw   1 LLww

2 LlWW  4 LlWw   2 Llww

1 llWW     2 llWw    1 llww

therefore,

long lash and dry ear wax = LLww (1) + Llww (2)

                                      =  3/16

there is a 3/16 chance that the child will have long eyelash and dry ear wax.

answer: the answer is b

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.