Question

Biology questions help me

1. The distinction between multifactorial and polygenic traits is that:

Select one:

a. polygenic traits are caused by more than one gene, and multifactorial traits are caused by one or more genes as well as environmental influences.

b. multifactorial traits are not genetic and polygenic traits are.

c. the genetic component can be determined for polygenic traits but not for multifactorial traits.

d. polygenic traits are caused by more than one gene and multifactorial traits are caused by only one gene.

2. If allele T (long tongue) exhibits incomplete dominance over the recessive allele t (short tongue), a heterozygote for this gene would most likely have:

Select one:

a. a long tongue.

b. a short tongue.

c. a tongue that changes length.

d. a tongue of intermediate length.

3. Mitochondrial disorders tend to cause great fatigue because:

Select one:

a. nerve cells are filled with mitochondria.

b. muscle cells are normally filled with mitochondria.

c. affected cells do not use their mitochondrial DNA.

d. lysosomes dismantle the mitochondria in muscle cells.

4. True or False: expression of the SRY gene triggers the development of male sexual reproductive organs.

Select one:

a. True

b. False

5. In pea plants, the allele for tall (T) is dominant to the allele for short (t). The genotype for a short pea plant is __.

Select one:

a. TT

b. Tt

c. tt

d. Tt or tt

Answer 1