Unit 6 quiz 2 Genetics and Punnett squares

Gregor Mendel used pea plants to study ___.

• flowering

• gamete formation

• the inheritance of traits

• cross-pollination

Gregor Mendel removed the male parts from the flowers of some plants in order to ___.

• prevent hybrids from forming

• prevent cross-pollination

• stimulate self-pollination

• make controlled crosses between plants

Gregor Mendel concluded that traits are ___.

• not inherited by offspring

• inherited through the passing of factors from parents to offspring

• determined by dominant factors only

• determined by recessive factors only

The principle of dominance states that ___.

• all alleles are dominant

• all alleles are recessive

• some alleles are dominant and others are recessive

• alleles are neither dominant nor recessive

When you flip a coin, what is the probability that it will come up tails?

• 1/2

• 1/4

• 1/8

• 1

Organisms that have two identical alleles for a particular trait are said to be ___.

• hybrid

• homozygous

• heterozygous

• dominant

What principle states that during gamete formation genes for different traits separate without influencing each other's inheritance?

• principle of dominance

• principle of independent assortment

• principle of probabilities

• principle of segregation

Situations in which one allele for a gene is not completely dominant over another allele for that gene are called ___.

• multiple alleles

• incomplete dominance

• polygenic inheritance

• multiple genes

A cross of a black chicken (BB) with a white chicken (WW) produces all speckled offspring (BBWW). This type of inheritance is known as ___.

• incomplete dominance

• polygenic inheritance

• codominance

• multiple alleles

If an organism's diploid number is 20, its haploid number is ___.

• 40

• 5

• 10

• 30