Question
All of the offspring produced in a cross of a brown mink and a silver-blue mink were brown. When these offspring were crossed, the ratio of brown mink to silver-blue mink was 3:1 Which concepts best explain the results of these two crosses? A. codominance, segregation and recombination B. recombination and intermediate inheritance C. independent assortment and crossing-over D. dominance, segregation, and recombination
Answer
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Jocasta
Master · Tutor for 5 years
Answer
D. dominance, segregation, and recombination
Explanation
## Step 1The problem involves understanding Mendelian genetics, particularly the concepts of dominance, segregation, and recombination. ## Step 2From the given problem, it is observed that when a brown mink and a silver-blue mink are crossed, all the offspring are brown. This suggests that the brown color is dominant over the silver-blue color. This is an example of the concept of dominance in Mendelian genetics.## Step 3In the second generation, the ratio of brown minks to silver-blue minks is 3:1. This is a typical Mendelian ratio for a monohybrid cross, where one trait is considered. This suggests that the genes for mink color segregate, or separate, during the formation of gametes in the parent organisms. This is an example of the concept of segregation in Mendelian genetics.## Step 4The ratio and observable features in the second generation stem from how these segregating genes recombine when the generation's members breed. This is an example of the concept of recombination in Mendelian genetics.