GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
All offspring will be genotype BB.
|
|
|
All offspring will be genotype bb.
|
|
|
It is impossible to predict what the genotypes of the offspring will be.
|
|
|
All offspring will be genotype Bb.
|
Detailed explanation-1: -The offspring of two homozygous dominant parents has a 75% chance of exhibiting the dominant trait.
Detailed explanation-2: -Genotypes with two alleles that are the same, i.e. ‘BB’ and ‘bb’, are known as homozygous genotypes and genotypes with two different alleles are known as heterozygous genotypes.
Detailed explanation-3: -Each parent contributes one allele to each of its offspring. Thus, in this cross, all offspring will have the Bb genotype. Each parent contributes one allele to each of its offspring. Thus, in this cross, all offspring will have the Bb genotype.
Detailed explanation-4: -One gene is for ear size (AA or Aa being big ears whereas aa is for small ears) and the other gene is for buggy eyes (BB and Bb for buggy eyes whereas bb represents normal eyes).