WorksheetsHeredity Quiz
Total questions: 10
Worksheet time: 8mins
The diagram shows the process of crossing over. Which claim about crossing over in chromosomes is best supported by the diagram?
Crossing over increases genetic diversity through deletion.
Crossing over decreases genetic diversity through mutation.
Crossing over increases genetic diversity by creating new combinations of genes.
Crossing over decreases genetic diversity by inserting nucleotides into gene sequences.
The form of a gene that is always expressed if present is the __________ form.
recessive
dominant
zygote
heterozygous
In pea plants, purple flowers are dominant to white flowers. Cross two heterozygous pea plants. What are the expected phenotypic results? You will need to make a Punnett square.
100% purple
25%purple, 75% white
75% purple, 25% white
50% purple, 50% white
If an organism inherits one dominant allele and one recessive allele for eye color, their genotype would be:
haploid
homozygous
heterozygous
homologous
Is the following genotype homozygous or heterozygous?
TT
homozygous
heterozygous
Is the following genotype homozygous or heterozygous?
Tt
homozygous
heterozygous
If square is DOMINANT over round what are the PHENOTYPES for the following genotypes?
SS, Ss, ss
square, round, round
round, square, square
round, square, round
square, square, round
In peas, round seeds are dominant to wrinkled seeds and yellow seeds are dominant to yellow seeds. Cross two pea plants that are homozygous dominant for both traits. What percent will have Round and Yellow seeds?
0%
25%
50%
100%
In pea plants tall stems (T) are dominant over short stems (t) and round seeds (R) are dominant over wrinkled seeds (r). Consider the following cross: TtRr X Ttrr.
How many of the offspring will be tall and wrinkled?
1/4
3/4
1/8
3/8
