Answer: B (Color blindness)
Explanation:
Typical red-green color blindness in human patients is caused by mutations on genes located in the X chromosome. These mutations act in a recessive manner. Since females have two X chromosomes, the presence of a mutation in a single one of them does not normally result in color blindness. Males, in contrast, have a single X chromosome and therefore the presence of a mutation is likely to cause the disease.
About the other options: Down‘s syndrome is a numerical chromosomal anomaly, not related to sex. Human blood type is a codominant trait. Finally, tail length in dogs is a polygenic trait not amenable to classic Mendelian analysis.
Son agrupaciones de estrellas reunidas bajo el mismo nombre. Estas estrellas reunidas bajo la misma región celeste forman aparentemente una figura.
1) A
2) B
3) B
4) C
5) B
6) C
7) D
8) B
9) A
10) A
