Sickle-cell anemia is caused by a recessive mutation in the hemoglobin gene. However, heterozygote individuals also show a small percentage of sickled red blood cells. What type of inheritance pattern is this an example of?
A) Polygenic inheritance B) Sex linked
C) Chromosomal nondisjunction D) Incomplete dominance
D
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In a normal Drosophila embryo, a gap gene called Krüppel is expressed in the anterior end because it is activated by Hunchback protein, and this region contains a high level of Hunchback
A. true B. false
Recall that two different groups of angiosperms exist. The ____ produce seeds that form a single cotyledon, and the seeds of ____ produce two cotyledons
Fill in the blank with the appropriate word.
In a frog in which the diploid number of chromosomes per cell is 24, what is the total number of
chromatids present during Prophase I?
a. 0 b. 6 c. 12 d. 24 e. 48
Following ovulation, the follicle develops into a corpus luteum
____________________ Indicate whether the statement is true or false.