Question:

Answer:

Question: During a single crossover event, how many strands of DNA must break? (recall that DNA is double stranded)

A) one strand

B) two strands

C) eight strands

D) four strands

Answer:

Question: A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T) . Its genotype is HhTt. Which of the following genotypes for these two genes is possible in a gamete from this organism?

A) HhTt

B) Tt

C) T

D) HT

Answer:

Question: Thomas Hunt Morgan’s experiments with fruit flies provided convincing evidence that

Answer: chromosomes are the location of Mendel’s heritable factors.

Question: Chromosome Theory of Inheritance

Answer: According to this theory, Mendelian genes have specific loci (sites) along chromosomes, and it is the chromosomes that undergo segregation and independent assortment.

Question: Sex linkage was discovered in

Answer: flies.

Question: Wild type

Answer:

Question: Sex linkage means that

Answer: the phenotypic ratios are different in males and females. Sex-linked inheritance lead to the discovery of sex chromosomes. The discovery of sex chromosomes was an important step in the discovery of chromosomes.

Question: Sex linkage usually refers to genes on the

Answer: X chromosome. Genes on the Y chromosome are called Y-linked genes; but there are very few of these. Most of these genes are related to fertility and sex determination. The X chromosome has many genes, most are unrelated to sex.

Question: Which one of Mendel’s laws describes the inheritance of alleles for a single character? Which law relates to the inheritance of alleles for two characters in a dihybrid cross?

Answer: The law of segregation describes the inheritance of alleles for a single character. The law of independent assortment of alleles describes the inheritance of alleles for two characters.