In humans, freckles are dominant to no freckles. A man with freckles is married to a woman with freckles, but the children have no freckles. What's the reason?
2 13067In horses, B = black, b = brown, T = trotter, t = pacer. A black pacer mated to a brown trotter produces a black trotter offspring year after year. What are the probable genotypes?
1 5412In human beings, brown eyes are usually dominant over blue eyes. Suppose a blue-eyed man marries a brown-eyed woman whose father was blue-eyed. What proportion of their children would you predict to have blue eyes?
1 19525A brown-eyed man whose father was brown-eyed and whose mother was blue-eyed married a blue-eyed woman whose mother and father were both brown-eyed. The couple has a blue-eyed son. What are the genotypes of all individuals?
1 9335In hogs a gene that produces a white belt around the animal's body is dominant over its allele for a uniform body. Another independent dominant gene produces fusion of the hoof (syndactyly). Suppose a uniformly colored hog homozygous for syndactyly is mated with a normal footed hog homozygous for the belted character. What would be the phenotype of the F1? If the F1's interbreed, what would be the phenotypic ratio of the F2?
5183For each of the following, state whether it is a gamete or a genotype of an individual a) TT b) Tg c) IcCC d) TW
2 3661The gene for tallness (T) is dominant over the gene for shortness (t) in pea plants. A homozygous dominant pea plant is crossed with a heterozygous pea plant, and 200 seeds are produced. Approximately how many of these seeds can be expected to produce plants that are homozygous dominant?
3 10439People who can roll their tongues contain a dominant allele for tongue rolling. If people do not contain the tongue rolling gene, then they cannot roll their tongue no matter how hard they try. Consider the following situation: If a homozygous dominant tongue roller mates with a homozygous recessive non-tongue roller, then what is the probability of the offspring inheriting the tongue rolling gene?
2 10037
How will you differentiate alleles of a gene in the double strand of DNA?
What are the 8 steps that are involved in genetic engineering?
What are the benefits/risks when company traditional and genetically engineered breeding?
If curly hair is genetic, why do you have curly hair if none of your ancestors did?
What situations might be viewed as ethical uses of human cloning? Are you doubtful, fearful, or hopeful about human cloning?
What is Heterozygote detection?
Suppose you are heterozygous for a mutant beta-thalassemia allele. If the frequency of beta-thalassemia is 1/1600 persons, what is the probabilty that your prospective spouse is heterozygous for a mutant beta-thalassemia allele?
What is the importance of genetics?
A single base exchange mutation occurs in the promoter of the TRP operon. How the operation of the HIS operon might be affected in two ways?
In cats yellow is due to gene B and black to its allele b. These genes are located on the X chromosome (sex-linked). The heterozygous results in calico (tortoise shell). What kinds of offspring (sex & color) are expected from the cross: black male & calico female? Most calico males are sterile, why?
Is Genetic engineering the best of solution?
Why was rii locus chosen by Benzer for his experiment?
bakit magkakaiba ng mukha ang tao
Does unwinding DNA cause aging?
A base deletion occurs in the regulator gene of the LAC operon. Describe how the operation of the LAC operon might be affected?
