Genetics and Meiosis

An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• four

An allele whose trait only shows up when no dominant allele is present.

• homozygous allele

• dominant allele
• recessive allele
• heterozygous allele

Two heterozygous (Tt) tall pea plants are crossed. Which describes the phenotypic probabilities of their offspring?

• 50% tall and 50% short
• 75% tall and 25% short

• 100% short

• 100% tall

Tags

NGSS.HS-LS3-3

Which of the following is NOT a true statement comparing meiosis with mitosis?

• meiosis produces 4 daughter cells, mitosis produces 2

• meiosis goes through two rounds of cell division, mitosis only has one round

• meiosis produces gametes, mitosis produces somatic cells

• meiosis follows interphase with DNA replication, mitosis does not need DNA replication

Which of the following represents an example of phenotypic plasticity?

• Plants with the same genotype have different leaf shapes depending upon the amount of sun they get

• Plants have different leaf shapes due to having different alleles for a gene

• Plants have the same leaf shape even though they have different genotypes for that trait

• Plants have the same leaf shape in different environments

Why are males more susceptible to sex-linked traits?

• They only need one recessive allele to express the trait since the Y chromosome does not have the same genes as the X

• Their Y chromosome holds many more genes that are associated with sex-linked traits than X chromosomes

• Their environment tends to affect their sex chromosomes more than it does in females

• They have more X chromosomes than females that hold more sex-linked traits than the Y chromosome

The egg and sperm fuse in the process of _________ to produce a ______.

• fertilization; zygote

• fertilization; gamete

• meiosis; zygote

• meiosis; gamete

Based on the information in the figure, the corn color here is an example of what type of inheritance?

• multiple alleles

• polygenic trait

• incomplete dominance

• codominance

The expression of one allele form completely masks the expression of the other allele form in what type of inheritance?

• Incomplete Dominance

• Complete (Mendelian) Dominance

• Codominance

• Phenotypic Plasticity

During meiosis, the homologous pairs of chromosomes (and matching alleles on them) are lined up independently and will randomly separate into different gametes. This describes which of Mendel's Laws?

• Law of Dominance

• Law of Segregation

• Law of Crossing Over

• Law of Independent Assortment