Neurofibromatosis is a condition in humans which is generally inherited in a dominant fashion. Assuming this disorder is 90% penetrant, what is the chance that a single child born to a father with neurofibromatosis and a mother known not to carry the mutation will have the disorder?

TLS Online TPP Program

#Question id: 5611

#Unit 5. Developmental Biology

Which ion play an essential role in pollen tube growth?

TLS Online TPP Program

#Question id: 5612

#Unit 5. Developmental Biology

Outside the egg cell membrane is an extracellular matrix that forms a fibrous mat around the egg and is often involved in sperm-egg recognition. In invertebrates, this structure is usually called the:

TLS Online TPP Program

#Question id: 5613

#Unit 5. Developmental Biology

Female mice with the CD9 gene knocked out are infertile because

TLS Online TPP Program

#Question id: 5614

#Unit 5. Developmental Biology

One difference between the blastula and gastrula stages of development is that

TLS Online TPP Program

#Question id: 5615

#Unit 5. Developmental Biology

The fast block to polyspermy is achieved by:

TLS Online TPP Program

#Question id: 5616

#Unit 5. Developmental Biology

In the sperm the elevated Ca2+ level in a relatively basic cytoplasm triggers