QUIZ 2: Patterns of Inheritance

A gene for flower color can have multiple alleles like purple, white, or red.

True

In sexual reproduction, offspring are similar to their parents, but unique as well.

True

Someone who has the blood type AB had parents with _____ genes.

codominant

The principle of _____ suggests that a plant with the genotype Tt will display a tall phenotype.

dominance

In the cross BB x bb, the percent of offspring in the F1 generation that will have the same genotype as one of their parents is _____.

0%

The probability that both of two tossed coins will come down heads is _____.

1/4

Different forms of a given gene are known as _____.

alleles

A TT genotype is said to be _____.

homozygous

Gregor Mendel is considered the Father of _____.

Genetics

If the parent genotypes are Aa and Aa, the offspring are expected to be _____.

1/4 AA, 1/2 Aa, 1/4 aa

The F2 generation phenotypes resulting from the monohybrid cross of purebreds display a ratio of _____.

3:1

In considering the cross YyRr x YyRr, the phenotype ratios of the F2 generation will be _____.

9:3:3:1

Each P1 parent of a monohybrid cross has completely identical genes.

False

In considering the cross YyRr x YyRr, the genotype ratio is YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:yyrr.

False

Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable genotypes of the snapdragons in your garden?

Rr only

Which cross will yield four phenotypes in the 1:1:1:1 ratio?

RrYy x rryy

In a dihybrid cross, round (RR), yellow (YY) seeds were crossed with wrinkled (rr), green (yy) seeds. What were the phenotypes of the F1 generation?

all round and yellow

Mendel's principle of segregation implies that the two members of an allelic pair of genes _____.

are distributed to separate gametes

Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)?

half red and half white

Genes that carry contrasting inheritance factors are called _____.

heterozygotes

When neither gene in a genotype pair is dominant and neither gene is recessive, the genes are said to be _____.

incomplete dominant alleles

A family has seven sons. The chance that their eighth child will be a daughter is _____.

one chance in two

The outward appearance of a particular trait is called the

phenotype