Two alleles of gene C control hair color in horses: C¹ and C². Horses homozygous for allele C¹ are red, heterozygotes are yellow, and C² homozygotes are cream. What type of allele interaction is described?
A) pleiotropy
B) complete dominance
C) incomplete dominance
D) recessive lethality
E) codominance
C) incomplete dominance
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Mutations in genes that affect __________ may cause morphological shifts in a lineage. Fill in the blank(s) with the appropriate word(s)
When the human gene coding for insulin is introduced into a mouse embryo, the gene is correctly expressed in the
appropriate tissue. This shows that:a. tissue-specific gene expression is highly conserved during evolution. b. the introduced gene was edited by the mouse embryo for proper function. c. the introduced gene was exactly the same as the mouse gene for insulin. d. mice and humans are not closely related. e. mouse genes are not tissue specific.
How are two different species most likely to evolve from one ancestral species?
A) sympatrically, by a point mutation affecting morphology or behavior B) sympatrically, due to extensive inbreeding C) allopatrically, due to extensive inbreeding D) allopatrically, after the ancestral species has split into two populations
Different serotypes belong to different species
Indicate whether the statement is true or false.