Genetics and Patterns of Inheritance

______________ is a diagram that can be used to predict the genotypes and phenotypes resulting from a genetic cross.

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NGSS.HS-LS3-1

Genes are ...

• That is hidden whenever the dominant allele is present

• Segment of DNA on chromosome that control a trait or characteristic

• A number of how an event occur

• An organism that has two different alleles for a trait

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NGSS.HS-LS3-1

Dominant alleles are alleles whose trait ......... shows up when the alleles is present.

• always

• never

• sometimes

• usually

Different forms of a gene

• Punnett square

• Gene

• Allele

• Homozygous

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NGSS.HS-LS3-1

A​ (a)   is expressed in an offspring ONLY when both parents pass the same allele down to the offspring.

• recessive trait

• dominant trait

• inherited trait

• acquired trait

Answer explanation

A recessive trait is only expressed when both parents contribute the recessive allele. In contrast, a dominant trait can be expressed with just one dominant allele. Therefore, the correct answer is 'recessive trait'.

Tags

NGSS.HS-LS3-1

Match the following

• Phenotype

• The trait that is masked or hidden by the dominant trait

• Dominant

• The trait that expresses itself over another

• Recessive

• Different form of a trait

• Genotype

• The gene make-up of a trait expressed as a set of capital and lower case letters

• Allele

• The physical presentation of the genetic expression

Plants that are ​ (a)   will always produce offspring with traits that match their own. Plants that use ​ (b)   to reproduce will show a dominant trait but now also contained a ​ (c)   gene. All offspring from the cross pollination are now considered ​ (d)   , which meant they all had different forms of the same trait. During the ​ (e)   generation of cross pollination a small percentage of offspring started to show the recessive gene.

• true breeding

• cross pollination

• recessive

• second

• hybrid

• first

• dominant

• mutations

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A​ (a)   shows its specific trait when both parents pass the

gene to the child.

• recessive trait

• dominant trait

• inherited trait

• acquired trait

Tags

NGSS.HS-LS3-1

​ ​ (a)   have both alleles equally expressed, while ​ (b)   has an intermediate between the two parents, neither trait is dominant.

• codominant traits

• incomplete dominance

• dominant

• recessive

Alleles whose trait always shows up when the allele is present

• Dominant alleles

• Recessive alleles

• Phenotype

• Genotype

Tags

NGSS.HS-LS3-1