As a result of marriage of curly hair mother and stright hair father, 8 children are born. The ratio of curly and straight haired will be a. $6:2$ b. $2:6$ c. $4:4$ d. $3:5$

Sure! Here are the step-by-step solutions: Given: - Curly hair is dominant - Straight hair is recessive To determine the genotype of an individual with curly hair: - Assign a letter to represent each allele (e.g. C for curly, c for straight) - Represent the genotype with two letters, one from each parent (e.g. CC, Cc, or cc) - If the individual has curly hair, they must have at least one dominant C allele - If the individual has two curly-haired parents (CC), they must have inherited two dominant C alleles and their genotype is also CC - If the individual has one curly-haired parent (Cc), they could have inherited a dominant C allele or a recessive c allele from that parent - To determine the individual's genotype in this case, use a Punnett square or the rules of probability to calculate the likelihood of each possible combination of alleles - For example, if the curly-haired parent is Cc, there is a 50% chance that they passed on a C allele and a 50% chance they passed on a c allele - So, if the individual has curly hair and one curly-haired parent (Cc), their genotype could be either CC or Cc (with a 50% chance of each) To determine the genotype of an individual with straight hair: - If the individual has straight hair, they must have inherited two recessive c alleles from their parents (cc) - If both parents have curly hair (CC or Cc), they could still pass on a recessive c allele to their offspring, but the offspring would be heterozygous (Cc) and would have curly hair. - So, if an individual has straight hair, both of their parents must have at least one recessive c allele (Cc or cc) Overall, understanding the inheritance patterns of curly and straight hair can help us predict the likelihood of certain genotypes and phenotypes in offspring based on their parents' traits.