Question

traits studied by mendel
plant height\ttall\tshort
flower color\tpurple\twhite
flower position\tend of stem\tmiddle of stem
pod color\tgreen\tyellow
pod shape\tinflated\tconstricted
seed color\tyellow\tgreen
seed shape\tsmooth\twrinkled
what do these characteristics all have in common?
○ they are all dominant.
○ they can all be easily observed.
○ they are all recessive.
○ they can all be applied to other plants.

Explanation:

1. Analyze Option 1: Some traits (e.g., short, white) are recessive, so not all are dominant. Eliminate this.
2. Analyze Option 2: Traits like plant height, flower color/position, pod and seed traits are visually observable (e.g., you can see tall/short, purple/white, etc.). This fits.
3. Analyze Option 3: Some traits (e.g., tall, purple) are dominant, so not all are recessive. Eliminate this.
4. Analyze Option 4: Mendel's pea plant traits may not apply to all other plants (e.g., unique to peas in some cases). Eliminate this.

Answer:

B. They can all be easily observed.