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April 17, 2014

Homework Help: 7th grade science

Posted by Delilah on Wednesday, December 12, 2012 at 10:27pm.

1.

A Punnett square shows you all the ways in which ____ can combine.
(1 point)

alleles

eggs

sperm

colors

2.

Mendel called plants that received different alleles for a trait from each parent ____.
(1 point)

hybrids

dominant

genotypes

phenotypes

3.
Which is a possible genotype of a child of parents with blood types O and AB? (1 point)

AO; BO

AB; BO

BO; OO
CO; AB

4.
You are looking at four tall pea plants. What are their phenotypes and genotypes, respectively? (1 point)

tall; Tt or TT

short; tt

Tt or TT; tall

tt; Short

5.
Which of the following diseases has already been helped by the use of recombinant DNA? (1 point)

diabetes

cystic fibrosis

heart disease

cancer

6.
_______ is one method of genetic engineering in which a useful segment of DNA from one organism is inserted into a bacterium. (1 point)

Gene therapy
Recombinant DNA
Selective breeding

Cloning

My answers:
1. alleles
2. hybrids
3. AO; BO
4. tall; Tt or TT
5. cystic fibrosis
6. Recombinant DNA

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