According to Mendelian genetics, the phenotype of a homozygous dominant individual is the same as that of a _______ individual. A)Heterozygous B)Heterozygous recessive C)Hemizygous D)Homozygous recessive

Sickle-cell disease is a recessive trait in humans. In a cross between a father who has sickle-cell disease and a mother who is heterozygous for the sickle-cell allele, what is the probability that all of their first three children will be unaffected? A) 1/4B) 1/2C) noneD) 1/8E) 1/16

all of the offspring of a cross between a black eyed mendelien and an orange-eyed mendelien have black eyes. This means that the allele for black eyes is ___ the allele for orange eyes. A)Codominant toB)more aggressive thanC)recessive toD)dominant toE)better than

A trait with a high concordance value in MZ twins has a   a) significant environmental component. b) significant random component. c) significant inherited component. d) no conclusions can be drawn in this case.

Dominant alleles are so called because under most circumstances they____ a) code for genes that are never considered lethal c) they are expressed whenever present d)code for desired traits only e) they are found on all 22 somatic chromosomes and not on sex chromosomes

All of the following are reasons that Mendel chose the pea plant as a model system for his studies EXCEPT ________. A) peas have a relatively short generation time B) peas produce large numbers of seeds C) he could control which parents were involved in mating D) peas only reproduce by cross-fertilization

An unaffected woman for a human disorder marries and unaffected man and they have children. This results in 3 affected sons, and one unaffected daughter, which ends up having children later on with an unaffected man and has 2 affected sons. A) Draw a simple pedigree diagram for this family, including a legend. B) What is the likely mode of inheritance of this trait: Please explain C) Provide the genotypes of the original mother and the daughter. Use a capital letter for the dominant allele and lowercase letter for the recessive allele. D) If one of the affected sons from the original marriage marries a 2nd cousin that is a carrier of this trait and has children, what is the probability that they will have 3 affected sons?

Curly hair is due to a dominant allele in humans. Straight hair is a recessice allele. the heterozygous condition produces wavy hair, a. phenotype that appears as a blend of the two alleles. This is an example of which of the following patterns of inheritance.   a) Simple dominant b) Sex linkage C) Multiple allele d)Incomplete dominance