Multiple Choice
In the context of organic chemistry reactions, what is the primary difference between substitution reactions and elimination reactions?
3. Acids and Bases
Organic Chemistry Reactions
Struggling with Organic Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In a cross between two organisms with the genotype bbrr, what percentage of the offspring will have the bbrr genotype?
A
50%
B
0%
C
100%
D
25%
Verified step by step guidance1
Identify the genotypes of the parent organisms involved in the cross. In this case, both parents have the genotype bbrr.
Understand that each parent can only pass on the alleles they possess. Since both parents are homozygous recessive for both traits (bb and rr), they can only pass on 'b' and 'r' alleles.
Set up a Punnett square to visualize the possible combinations of alleles in the offspring. Since both parents are bbrr, the Punnett square will have 'b' and 'r' alleles from each parent.
Fill in the Punnett square by combining the alleles from each parent. Each offspring will receive one 'b' allele and one 'r' allele from each parent, resulting in the genotype bbrr for all offspring.
Conclude that since all possible combinations in the Punnett square result in the genotype bbrr, 100% of the offspring will have the bbrr genotype.
0:29mWatch next
Master What you need to know about types of chemical reactions. with a bite sized video explanation from Johnny
Start learningRelated Videos
Related Practice
Organic Chemistry Reactions practice set
Problem sets built by lead tutorsExpert video explanations