The PHYA gene is transcriptionally active in dark-grown seedlings, but its expression is strongly inhibited in the light in monocots.

TLS Online TPP Program

#Id: 959

#Unit 5. Developmental Biology

Slow block to polyspermy (cortical granule reaction) becomes active about a minute after the first successful sperm-egg fusion

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#Id: 8891

#Unit 2. Cellular Organization

Kinetochores assemble on regions of chromosomal DNA marked by a centromere-specific H3 histone variant called CENP-A.

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#Id: 6248

#Unit 8. Inheritance Biology

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#Id: 8351

#Unit 2. Cellular Organization

WASp activation requires two signals (This type of two-signal input, called coincidence detection):

1. regulatory phospholipid PIP2

2. small GTP-binding protein Cdc42

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#Id: 408

#Unit 2. Cellular Organization

Histone H3.1 is replicative histone.