The tendency of later learning to hinder the memory of previously learned material.
Answer: 4/16 yellow Labradors, 9/16 black Labradors and 3/16 brown Labradors.
Explanation: Two dihybrids would have BbEe alleles. Using Mendel's chess table of independent segregation to show the offspring, we have the following results:
BBee - 1/16 - yellow
BBEe - 2/16 - black
BBEE - 1/16 - black
BbEe - 4/16 - black
Bbee - 2/16 - yellow
BbEE - 2/16 - black
bbEe - 2/16 - brown
bbEE - 1/16 - brown
bbee - 1/16 - yellow
If the offspring presents B_E_ phenotypes, it will have black pigment deposition. If the offspring presents bbE_ phenotypes, it will have brown pigment deposition. Otherwise, if it presents _ _ee phenotypes, there won't be any pigment deposition, therefore they are yellow.
Adding up all the phenotypes ratios, we have <u>4/16 yellow Labradors, 9/16 black Labradors and 3/16 brown Labradors</u>.
During the past 100 years, the major causes of death have shifted from INFECTIOUS DISEASES to CHRONIC DISEASES.
About a century ago, most diseases were usually acquired by people as a result of infection, that is, the causative organisms are usually passed from one person to another. But since the advent of microbiology in medicine, the trend has change, because the microbes can now be countered using different antibiotic means.
Answer:
having traits that help a single organism survive