Biology test study questions

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

False

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

are distributed to separate gametes

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

0%

The probability that both of two tossed coins will come down heads (or tails) is:

1/2 x 1/2 or 1/4

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

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

The second generation phenotypes resulting from the cross of true-breeding monohybrid pollination will display a ratio of:

1:3

Indicate the phenotypic ratio of crossing the offspring of the agouti and chinchilla.

3/4 agouti, 1/4 chinchilla

How many combinations of genotypes are possible for the coat coloration of rabbits which is governed by three alleles?

6

In considering this cross (YyRr and YyRr), the phenotype ratios of F2 generation will be _____.

9:3:3:1

In considering the cross from YyRr and YyRr, the ratio of traits will be _ yellow smooth, _ yellow wrinkled, _ white smooth, and _ white wrinkled.

9,3,3,1

In considering this cross (YyRr and YyRr), the genotype ratio is: YYRR; 2YYRr; 2Yyrr; 4YyRr; YYrr; 2Yyrr; yyRR; yyRr; yyrr.

False

Which of these paired genes is homozygous?

PP and pp

This cross will yield four phenotypes in the 1:1:1:1 ratio:

RrYy x rryy

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3:1. If the allele are designated (R & r) receptively. What is the probable Phenotype of the parents (P1)?

all round

Different forms of a given gene are known as:

alleles

Genes that carry contrasting inheritance factors are called:

heterozygotes

A (TT) genotype is said to be:

homozygous

When neither of the genes of a pair are dominant nor 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

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3:1. The allele are designated (R & r) receptively. What is the probable genotypes of the wrinkled seeds which produced (F1)?

rr only