Effects of Mutations on RNA Splicing in Eukaryotes?

Most eukaryotic genes have noncoding stretches of nucleotides (introns) that lie between the coding regions (exons). Both introns and exons are transcribed, but the introns are then cut out of the primary transcript and the exons joined together. This process, called RNA splicing, produces mature mRNA that contains only exons.
Certain mutations affecting introns can interfere with RNA splicing.

the answer is :

the correct answer is sex-linked recessive.

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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.