Question

Match the descriptors to the list: (some answers may be use more than once)

1. the phenotype of an individual that is hetrosygous for a trait

2. following a monohybrid self-fertilization, this percentage of individuals will display the dominant pheno

3. an individual that is hetrozygous for one trait

a. 25

b. 75

c. 100

d. cross

e. dihybrid

f. dominant

g. homologous chromosomes

h. monohybrid i. recessive

j. sister chromatids

k. test cross

l. wildtype

Answer 1

1. Dominant, wildtype; The phenotype of an individual that is heterozygous for a trait will be dominant and wild type. Heterozygous for a trait means presence of both dominant and recessive allele and when dominant and recessive are present then dominant phenotype is expressed. Dominant phenotype is also known as wiltype variety.

2. 75, 100. A monohybrid will be either homozygous or heterozygous. In case of homozygous (AA) a self-fertilization (AA X AA) will produce 100% dominant phenotype and in case of heterozygous (Aa) a self fertilization (Aa X Aa) will produce 75% dominant phenotype because genotype of progeny will be AA, Aa, Aa and aa. Only aa will be recessive and thus rest all (75%) will have dominant phenotype

3. Monohybrid, dominant: If we are talkin about one trait it means it is monohybrid and since the condition is heterozygous the phenotype will be dominant.