What structure is most important in forming the tetrads?
a. centromere
b. synaptonemal complex
c. chiasma
d. kinetochore
Answer: b. synaptonemal complex
You might also like to view...
Which occurs last in the stages of infection and recovery?
a. inflammation b. attack by lysozymes in sweat and saliva c. antibody-mediated immune response d. production of mucous e. production of interferon
In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have high levels of mutation within his mature sperm. C. He would have difficulty getting and/or sustaining an erection. D. He would have a low sperm count due to decreased spermatogenesis.
Homeotic genes of Drosophila:a
cause cells of the same type to produce differing amounts of gene products. b. specifies the developmental plan for each part of each segment. c. are expressed in only one sex in any particular species. d. when mutated, cause body parts to be duplicated. e. control developmental timing.
Given an inheritance pattern of incomplete dominance and 81 flowers that are red (R1R1), 18 flowers that are pink (R1R2), and 1 flower that is white (R2R2), the frequency of the R1 allele is 0.9
Indicate whether the statement is true or false